The document summarizes topics related to the digestive system and enzymes. It describes the roles of different organs in the digestive system like the mouth, stomach, and small intestine. It explains the processes of digestion like mechanical and chemical digestion. It discusses the different types of enzymes involved in digestion of carbohydrates, lipids, and proteins. Finally, it covers topics like protein structure, denaturation, and types of proteins like fibrous and globular proteins.
Digestion is the process by which food is broken down into smaller molecules that can be absorbed into the bloodstream and used by cells to provide energy and building materials. Various organs work together to mechanically and chemically break down food, including the mouth, stomach, and small intestine. Enzymes play a key role in digestion by speeding up chemical reactions to break nutrients like carbohydrates, proteins, and fats into simpler substances like glucose, amino acids, and fatty acids. The small intestine contains villi and microvilli that increase its surface area for absorption of digested nutrients into the bloodstream via diffusion and active transport.
The document discusses the role of enzymes in digestion. It begins by naming the organs of the digestive system in order. It then explains that different enzymes are added at various stages of digestion to break down different components of food. Specifically, amylase breaks down carbohydrates into sugars, proteases break down proteins into amino acids, and lipase breaks down fats into glycerol and fatty acids. Enzymes are able to carry out these breakdown processes through chemical reactions in acidic or emulsified environments tailored to their functions.
Carbohydrates are digested in the mouth by salivary amylase and in the small intestine by pancreatic amylase and intestinal enzymes. Monosaccharides like glucose are absorbed into the bloodstream through active transport involving sodium-glucose transporters in the intestinal walls. Glucose is the primary fuel for cells and its uptake is mediated by glucose transporters, especially GLUT2 and GLUT4 which are regulated by insulin. Deficiencies in disaccharide-digesting enzymes can cause issues like lactose intolerance and related symptoms.
This document summarizes the digestion and absorption of proteins in the human body. It discusses that proteins are obtained endogenously from digestive enzymes and cells, as well as exogenously from dietary intake. The stomach contains hydrochloric acid and pepsin to denature and break down proteins. The pancreas secretes trypsinogen, chymotrypsinogen, and other zymogens which are activated and further digest proteins into peptides and amino acids in the small intestine. Aminopeptidases and dipeptidases on intestinal cells complete the digestion. Amino acids are then absorbed via active transport systems involving sodium and ATP. Deficiencies or defects in these digestive processes can impair protein digestion.
The document summarizes the digestion and absorption of proteins in the human body. Dietary and endogenous proteins are broken down through digestion by enzymes in the stomach, pancreas, and intestines. In the stomach, pepsin digests proteins into proteoses and peptones. The pancreas secretes trypsin, chymotrypsin, and other enzymes as zymogens which are activated and further break down proteins. In the intestines, aminopeptidases and dipeptidases break down peptides into amino acids, which are then absorbed into the bloodstream through active transport mechanisms.
Absorption of proteins ppt
composition of protein ppt
digestion of protein ppt
Absorption of protein ppt
absorption of amino acid ppt
function of protein ppt
amino acid ppt
role enzyme ppt
The document discusses protein digestion and absorption. Proteins are broken down into peptides and amino acids by digestive enzymes in the stomach and small intestine. Peptides and amino acids are then absorbed into the bloodstream. Most proteins must be fully broken down before absorption, though some intact proteins can be absorbed by infants or through abnormal routes in adults. The amino acids are used throughout the body for protein synthesis, energy production, and other purposes.
The document provides information about various biomolecules including carbohydrates, lipids, proteins, amino acids, glucose, ribose, and fatty acids. It includes diagrams of their structures and functions in animals and plants. Assessment statements are provided related to distinguishing organic and inorganic compounds, identifying biomolecule structures, examples of mono/di/polysaccharides and their functions, the roles of condensation and hydrolysis reactions, and comparing carbohydrate and lipid use for energy storage.
Digestion is the process by which food is broken down into smaller molecules that can be absorbed into the bloodstream and used by cells to provide energy and building materials. Various organs work together to mechanically and chemically break down food, including the mouth, stomach, and small intestine. Enzymes play a key role in digestion by speeding up chemical reactions to break nutrients like carbohydrates, proteins, and fats into simpler substances like glucose, amino acids, and fatty acids. The small intestine contains villi and microvilli that increase its surface area for absorption of digested nutrients into the bloodstream via diffusion and active transport.
The document discusses the role of enzymes in digestion. It begins by naming the organs of the digestive system in order. It then explains that different enzymes are added at various stages of digestion to break down different components of food. Specifically, amylase breaks down carbohydrates into sugars, proteases break down proteins into amino acids, and lipase breaks down fats into glycerol and fatty acids. Enzymes are able to carry out these breakdown processes through chemical reactions in acidic or emulsified environments tailored to their functions.
Carbohydrates are digested in the mouth by salivary amylase and in the small intestine by pancreatic amylase and intestinal enzymes. Monosaccharides like glucose are absorbed into the bloodstream through active transport involving sodium-glucose transporters in the intestinal walls. Glucose is the primary fuel for cells and its uptake is mediated by glucose transporters, especially GLUT2 and GLUT4 which are regulated by insulin. Deficiencies in disaccharide-digesting enzymes can cause issues like lactose intolerance and related symptoms.
This document summarizes the digestion and absorption of proteins in the human body. It discusses that proteins are obtained endogenously from digestive enzymes and cells, as well as exogenously from dietary intake. The stomach contains hydrochloric acid and pepsin to denature and break down proteins. The pancreas secretes trypsinogen, chymotrypsinogen, and other zymogens which are activated and further digest proteins into peptides and amino acids in the small intestine. Aminopeptidases and dipeptidases on intestinal cells complete the digestion. Amino acids are then absorbed via active transport systems involving sodium and ATP. Deficiencies or defects in these digestive processes can impair protein digestion.
The document summarizes the digestion and absorption of proteins in the human body. Dietary and endogenous proteins are broken down through digestion by enzymes in the stomach, pancreas, and intestines. In the stomach, pepsin digests proteins into proteoses and peptones. The pancreas secretes trypsin, chymotrypsin, and other enzymes as zymogens which are activated and further break down proteins. In the intestines, aminopeptidases and dipeptidases break down peptides into amino acids, which are then absorbed into the bloodstream through active transport mechanisms.
Absorption of proteins ppt
composition of protein ppt
digestion of protein ppt
Absorption of protein ppt
absorption of amino acid ppt
function of protein ppt
amino acid ppt
role enzyme ppt
The document discusses protein digestion and absorption. Proteins are broken down into peptides and amino acids by digestive enzymes in the stomach and small intestine. Peptides and amino acids are then absorbed into the bloodstream. Most proteins must be fully broken down before absorption, though some intact proteins can be absorbed by infants or through abnormal routes in adults. The amino acids are used throughout the body for protein synthesis, energy production, and other purposes.
The document provides information about various biomolecules including carbohydrates, lipids, proteins, amino acids, glucose, ribose, and fatty acids. It includes diagrams of their structures and functions in animals and plants. Assessment statements are provided related to distinguishing organic and inorganic compounds, identifying biomolecule structures, examples of mono/di/polysaccharides and their functions, the roles of condensation and hydrolysis reactions, and comparing carbohydrate and lipid use for energy storage.
Interaction between carbohydrate , protein and fat metabolismSweta Ghosh
The breakdown and synthesis of carbohydrates, proteins, and lipids connect with the pathways of glucose catabolism. The simple sugars are galactose, fructose, glycogen, and pentose. These are catabolized during glycolysis. The amino acids from proteins connect with glucose catabolism through pyruvate, acetyl CoA, and components of the citric acid cycle. Cholesterol synthesis starts with acetyl groups, and the components of triglycerides come from glycerol-3-phosphate from glycolysis and acetyl groups produced in the mitochondria from pyruvate.
This document summarizes a lecture on lipids and carbohydrates given by Dr. Arunima Karkun. It discusses the characteristics and classes of lipids, including their roles as energy sources and structural components. Specific fatty acids are identified, and the differences between saturated and unsaturated fatty acids are explained. The multi-step process of lipid digestion and absorption is outlined. Factors that influence the absorption of lipids are also reviewed. Finally, essential fatty acids and their importance for animals and crustaceans are described.
Digestion and Absorption of carbohydratesAshok Katta
The document summarizes the digestion and absorption of carbohydrates. Carbohydrate digestion begins in the mouth where salivary amylase breaks down starches. Digestion pauses in the stomach but continues in the small intestine where pancreatic amylase and intestinal enzymes break carbohydrates down into monosaccharides like glucose and fructose. These monosaccharides are then absorbed into the bloodstream via facilitated diffusion or active transport using glucose transporters. Undigested carbohydrates like cellulose provide fiber in the diet. Lactose intolerance and sucrase deficiency can occur if enzymes that break down lactose or sucrose are deficient.
- Proteins are composed of chains of amino acids linked together. There are 20 naturally occurring amino acids that make up proteins.
- Amino acids contain both an acidic and basic functional group. Their properties are pH dependent and they can exist in zwitterionic forms.
- Protein structure is organized in four levels: primary, secondary, tertiary, and quaternary. Secondary structure includes alpha helices and beta sheets. Tertiary structure involves folding and twisting of the chain.
The document discusses the role of digestive enzymes in breaking down food molecules in the digestive system. Starch is broken down by amylase into maltose and then further by maltase into glucose. Proteins are broken down by trypsin into peptides and then by peptidases into amino acids. Lipase breaks down fats into fatty acids and glycerol. The structure and specificity of enzymes is also described.
This document summarizes the digestion and absorption of proteins. It explains that proteins are broken down into amino acids by proteolytic enzymes in the stomach, pancreas, and small intestine. These amino acids are then absorbed into the bloodstream through active transport mechanisms in the intestinal epithelium. Genetic disorders like Hartnup's disease and cystinuria can impair amino acid transport and cause amino acids to be lost in urine or feces.
Proteins are made of amino acids and have primary, secondary, tertiary, and quaternary levels of structure. They perform many essential functions in the body. Protein digestion begins in the stomach through the actions of gastric acid and the enzyme pepsin. Pepsin breaks proteins into smaller polypeptides and proteoses. In the small intestine, pancreatic enzymes and bile further break down polypeptides into dipeptides and free amino acids which can then be absorbed.
Unit 4 discusses biological molecules including carbohydrates, fats, proteins, and water. Carbohydrates include sugars and starches made of carbon, hydrogen, and oxygen, and serve as energy sources. Fats contain glycerol and fatty acids and store large amounts of energy. Proteins are made of amino acids and perform important roles in structure, enzymes, antibodies, and cell formation. Water is essential for life as it allows metabolic reactions to occur and is the main component of blood, digestive fluids, and other tissues. The document outlines properties and functions of these molecules and describes common tests to identify their presence.
Proteins are digested in the stomach by pepsin and in the small intestine by proteases like trypsin, chymotrypsin, and carboxypeptidases secreted by the pancreas. These enzymes break proteins down into dipeptides and amino acids. Amino acids are absorbed into the bloodstream via active transport mechanisms in the intestinal epithelium and transported to tissues. Some diseases that can impair protein digestion and absorption include pancreatitis, inborn errors of amino acid transport, and celiac disease.
Protein digestion is a two-step process involving enzymes in the stomach and small intestine. In the stomach, pepsin breaks down proteins into smaller polypeptides and some amino acids. In the small intestine, proteases like trypsin and peptidases further break down polypeptides into dipeptides and individual amino acids, which are then absorbed. Tests like Biuret can detect the presence of proteins and the completeness of digestion. Factors like pH, temperature, and inhibitors affect the efficiency of protein digestion.
The document discusses the four main macromolecules - carbohydrates, lipids, proteins, and nucleic acids. It provides details on each macromolecule, including their monomers, structure, function and digestion. It also discusses enzymes and their role in speeding up chemical reactions in the body, as well as the role of ATP in energy storage and transfer.
This document discusses enzyme digestion in the human digestive system. It explains that chemical digestion uses enzymes to break down food into smaller molecules that can be absorbed. The major organs involved include the liver, gallbladder, and pancreas. The pancreas produces enzymes that digest fats, carbohydrates, and proteins in the small intestine. Hydrolysis is the process by which enzymes break bonds between larger nutrient molecules, converting carbohydrates, lipids, and proteins into simpler forms like sugars, fatty acids, glycerol, and amino acids that can be absorbed. Different enzymes are involved in digesting each macronutrient type at various locations along the digestive tract.
The chemistry of digestion is simple because, in the case of all three major types of food (carbohydrates, proteins and fats), the same basic process of hydrolysis is involved. The only difference lies in the types of enzymes required to promote the hydrolysis reactions for each type of food.
All cells share similarities in their basic macromolecular components and chemical reactions. They all use nucleic acids like DNA and RNA to store and access genetic information. Proteins, which are polymers of amino acids, serve as enzymes to catalyze cellular reactions. Lipids form cellular membranes and carbohydrates serve structural and energy roles. The same condensation and hydrolysis reactions are used to form and break down these macromolecules in all organisms, reflecting their shared evolutionary origin.
Protein metabolism involves the breakdown of proteins into amino acids and their use and degradation throughout the body. Amino acids from food sources are broken down through digestion and absorbed. They are used for protein synthesis, forming hormones and other compounds, and undergo constant breakdown and renewal to replenish amino acid reserves. Excess amino acids have their nitrogen removed through transamination or oxidative deamination, producing ammonia. The liver plays a key role in nitrogen excretion by converting toxic ammonia into less toxic urea via the urea cycle, which is then excreted in urine.
This document provides an overview of key biological molecules including carbohydrates, lipids, proteins, and nucleic acids. It discusses their structure and functions. Carbohydrates include monosaccharides like glucose that can form disaccharides (e.g. sucrose) and polysaccharides (e.g. starch, glycogen). Lipids are made of glycerol and fatty acids and include fats, phospholipids, and steroids. Proteins consist of amino acid polymers that form complex structures. Nucleic acids DNA and RNA store and transmit genetic information as polynucleotides made of nucleotides. Vitamins are organic compounds required in small amounts for many functions. The document examines these molecules in depth across multiple chapters.
In this section, we describe digestion and absorption of proteins.
Most of the slides are cited from:
1. Lippincott's Illustrated Review Biochemistry
2. U. Satyrana Biochemistry
Dr. Haroon
The document discusses amino acid degradation pathways and their links to the citric acid cycle and urea cycle. It identifies which amino acids are ketogenic or glucogenic and break down into key metabolic intermediates like acetyl-CoA, α-ketoglutarate, succinyl-CoA, fumarate, oxaloacetate, or pyruvate. It also notes that branched-chain amino acids are oxidized primarily in muscle, adipose, kidney and brain rather than the liver, and that alanine transports ammonia from skeletal muscles to the liver for urea synthesis.
This document summarizes carbohydrate digestion in the human gastrointestinal tract. It describes how carbohydrates are broken down into smaller molecules by salivary and pancreatic amylases and intestinal disaccharidases and oligosaccharidases. The monosaccharides glucose, fructose and galactose that are produced are then absorbed into the bloodstream in the small intestine. Glucose absorption is an active process that utilizes sodium-glucose co-transporters, while fructose absorption occurs via facilitated diffusion. Factors that can influence carbohydrate absorption such as intestinal health, hormones and vitamins are also discussed.
This document summarizes the functions of various digestive secretory glands and hormones. It discusses:
1) The secretion of digestive enzymes by the salivary glands, stomach, pancreas, and small intestine to break down food. This includes amylase, pepsinogen, lipase, and peptidases.
2) The production of mucus by glands throughout the digestive tract to lubricate and protect the alimentary tract.
3) The roles of hormones like gastrin, secretin, cholecystokinin, and gastric inhibitory peptide in stimulating or inhibiting the secretion of enzymes and acid throughout digestion.
Digestion is the process of breaking down food into simpler components so that the body can absorb nutrients. This occurs through the action of digestive enzymes secreted by glands in the mouth, stomach, pancreas, and small intestine. These enzymes break down proteins, carbohydrates, and fats into their basic building blocks like amino acids, simple sugars, and fatty acids. The main sites of digestion are the oral cavity, stomach, duodenum and jejunum where different enzymes break down components of food at each location to prepare it for absorption in the small intestine.
The document discusses the role of enzymes in the digestive system. It describes the main organs of the digestive system and explains how digestive enzymes break down large insoluble molecules of food, such as carbohydrates, proteins and lipids, into smaller soluble molecules. Specifically, it states that carbohydrates are broken down into sugars by carbohydrase enzymes, proteins into amino acids by protease enzymes, and lipids into fatty acids and glycerol by lipase enzymes.
Interaction between carbohydrate , protein and fat metabolismSweta Ghosh
The breakdown and synthesis of carbohydrates, proteins, and lipids connect with the pathways of glucose catabolism. The simple sugars are galactose, fructose, glycogen, and pentose. These are catabolized during glycolysis. The amino acids from proteins connect with glucose catabolism through pyruvate, acetyl CoA, and components of the citric acid cycle. Cholesterol synthesis starts with acetyl groups, and the components of triglycerides come from glycerol-3-phosphate from glycolysis and acetyl groups produced in the mitochondria from pyruvate.
This document summarizes a lecture on lipids and carbohydrates given by Dr. Arunima Karkun. It discusses the characteristics and classes of lipids, including their roles as energy sources and structural components. Specific fatty acids are identified, and the differences between saturated and unsaturated fatty acids are explained. The multi-step process of lipid digestion and absorption is outlined. Factors that influence the absorption of lipids are also reviewed. Finally, essential fatty acids and their importance for animals and crustaceans are described.
Digestion and Absorption of carbohydratesAshok Katta
The document summarizes the digestion and absorption of carbohydrates. Carbohydrate digestion begins in the mouth where salivary amylase breaks down starches. Digestion pauses in the stomach but continues in the small intestine where pancreatic amylase and intestinal enzymes break carbohydrates down into monosaccharides like glucose and fructose. These monosaccharides are then absorbed into the bloodstream via facilitated diffusion or active transport using glucose transporters. Undigested carbohydrates like cellulose provide fiber in the diet. Lactose intolerance and sucrase deficiency can occur if enzymes that break down lactose or sucrose are deficient.
- Proteins are composed of chains of amino acids linked together. There are 20 naturally occurring amino acids that make up proteins.
- Amino acids contain both an acidic and basic functional group. Their properties are pH dependent and they can exist in zwitterionic forms.
- Protein structure is organized in four levels: primary, secondary, tertiary, and quaternary. Secondary structure includes alpha helices and beta sheets. Tertiary structure involves folding and twisting of the chain.
The document discusses the role of digestive enzymes in breaking down food molecules in the digestive system. Starch is broken down by amylase into maltose and then further by maltase into glucose. Proteins are broken down by trypsin into peptides and then by peptidases into amino acids. Lipase breaks down fats into fatty acids and glycerol. The structure and specificity of enzymes is also described.
This document summarizes the digestion and absorption of proteins. It explains that proteins are broken down into amino acids by proteolytic enzymes in the stomach, pancreas, and small intestine. These amino acids are then absorbed into the bloodstream through active transport mechanisms in the intestinal epithelium. Genetic disorders like Hartnup's disease and cystinuria can impair amino acid transport and cause amino acids to be lost in urine or feces.
Proteins are made of amino acids and have primary, secondary, tertiary, and quaternary levels of structure. They perform many essential functions in the body. Protein digestion begins in the stomach through the actions of gastric acid and the enzyme pepsin. Pepsin breaks proteins into smaller polypeptides and proteoses. In the small intestine, pancreatic enzymes and bile further break down polypeptides into dipeptides and free amino acids which can then be absorbed.
Unit 4 discusses biological molecules including carbohydrates, fats, proteins, and water. Carbohydrates include sugars and starches made of carbon, hydrogen, and oxygen, and serve as energy sources. Fats contain glycerol and fatty acids and store large amounts of energy. Proteins are made of amino acids and perform important roles in structure, enzymes, antibodies, and cell formation. Water is essential for life as it allows metabolic reactions to occur and is the main component of blood, digestive fluids, and other tissues. The document outlines properties and functions of these molecules and describes common tests to identify their presence.
Proteins are digested in the stomach by pepsin and in the small intestine by proteases like trypsin, chymotrypsin, and carboxypeptidases secreted by the pancreas. These enzymes break proteins down into dipeptides and amino acids. Amino acids are absorbed into the bloodstream via active transport mechanisms in the intestinal epithelium and transported to tissues. Some diseases that can impair protein digestion and absorption include pancreatitis, inborn errors of amino acid transport, and celiac disease.
Protein digestion is a two-step process involving enzymes in the stomach and small intestine. In the stomach, pepsin breaks down proteins into smaller polypeptides and some amino acids. In the small intestine, proteases like trypsin and peptidases further break down polypeptides into dipeptides and individual amino acids, which are then absorbed. Tests like Biuret can detect the presence of proteins and the completeness of digestion. Factors like pH, temperature, and inhibitors affect the efficiency of protein digestion.
The document discusses the four main macromolecules - carbohydrates, lipids, proteins, and nucleic acids. It provides details on each macromolecule, including their monomers, structure, function and digestion. It also discusses enzymes and their role in speeding up chemical reactions in the body, as well as the role of ATP in energy storage and transfer.
This document discusses enzyme digestion in the human digestive system. It explains that chemical digestion uses enzymes to break down food into smaller molecules that can be absorbed. The major organs involved include the liver, gallbladder, and pancreas. The pancreas produces enzymes that digest fats, carbohydrates, and proteins in the small intestine. Hydrolysis is the process by which enzymes break bonds between larger nutrient molecules, converting carbohydrates, lipids, and proteins into simpler forms like sugars, fatty acids, glycerol, and amino acids that can be absorbed. Different enzymes are involved in digesting each macronutrient type at various locations along the digestive tract.
The chemistry of digestion is simple because, in the case of all three major types of food (carbohydrates, proteins and fats), the same basic process of hydrolysis is involved. The only difference lies in the types of enzymes required to promote the hydrolysis reactions for each type of food.
All cells share similarities in their basic macromolecular components and chemical reactions. They all use nucleic acids like DNA and RNA to store and access genetic information. Proteins, which are polymers of amino acids, serve as enzymes to catalyze cellular reactions. Lipids form cellular membranes and carbohydrates serve structural and energy roles. The same condensation and hydrolysis reactions are used to form and break down these macromolecules in all organisms, reflecting their shared evolutionary origin.
Protein metabolism involves the breakdown of proteins into amino acids and their use and degradation throughout the body. Amino acids from food sources are broken down through digestion and absorbed. They are used for protein synthesis, forming hormones and other compounds, and undergo constant breakdown and renewal to replenish amino acid reserves. Excess amino acids have their nitrogen removed through transamination or oxidative deamination, producing ammonia. The liver plays a key role in nitrogen excretion by converting toxic ammonia into less toxic urea via the urea cycle, which is then excreted in urine.
This document provides an overview of key biological molecules including carbohydrates, lipids, proteins, and nucleic acids. It discusses their structure and functions. Carbohydrates include monosaccharides like glucose that can form disaccharides (e.g. sucrose) and polysaccharides (e.g. starch, glycogen). Lipids are made of glycerol and fatty acids and include fats, phospholipids, and steroids. Proteins consist of amino acid polymers that form complex structures. Nucleic acids DNA and RNA store and transmit genetic information as polynucleotides made of nucleotides. Vitamins are organic compounds required in small amounts for many functions. The document examines these molecules in depth across multiple chapters.
In this section, we describe digestion and absorption of proteins.
Most of the slides are cited from:
1. Lippincott's Illustrated Review Biochemistry
2. U. Satyrana Biochemistry
Dr. Haroon
The document discusses amino acid degradation pathways and their links to the citric acid cycle and urea cycle. It identifies which amino acids are ketogenic or glucogenic and break down into key metabolic intermediates like acetyl-CoA, α-ketoglutarate, succinyl-CoA, fumarate, oxaloacetate, or pyruvate. It also notes that branched-chain amino acids are oxidized primarily in muscle, adipose, kidney and brain rather than the liver, and that alanine transports ammonia from skeletal muscles to the liver for urea synthesis.
This document summarizes carbohydrate digestion in the human gastrointestinal tract. It describes how carbohydrates are broken down into smaller molecules by salivary and pancreatic amylases and intestinal disaccharidases and oligosaccharidases. The monosaccharides glucose, fructose and galactose that are produced are then absorbed into the bloodstream in the small intestine. Glucose absorption is an active process that utilizes sodium-glucose co-transporters, while fructose absorption occurs via facilitated diffusion. Factors that can influence carbohydrate absorption such as intestinal health, hormones and vitamins are also discussed.
This document summarizes the functions of various digestive secretory glands and hormones. It discusses:
1) The secretion of digestive enzymes by the salivary glands, stomach, pancreas, and small intestine to break down food. This includes amylase, pepsinogen, lipase, and peptidases.
2) The production of mucus by glands throughout the digestive tract to lubricate and protect the alimentary tract.
3) The roles of hormones like gastrin, secretin, cholecystokinin, and gastric inhibitory peptide in stimulating or inhibiting the secretion of enzymes and acid throughout digestion.
Digestion is the process of breaking down food into simpler components so that the body can absorb nutrients. This occurs through the action of digestive enzymes secreted by glands in the mouth, stomach, pancreas, and small intestine. These enzymes break down proteins, carbohydrates, and fats into their basic building blocks like amino acids, simple sugars, and fatty acids. The main sites of digestion are the oral cavity, stomach, duodenum and jejunum where different enzymes break down components of food at each location to prepare it for absorption in the small intestine.
The document discusses the role of enzymes in the digestive system. It describes the main organs of the digestive system and explains how digestive enzymes break down large insoluble molecules of food, such as carbohydrates, proteins and lipids, into smaller soluble molecules. Specifically, it states that carbohydrates are broken down into sugars by carbohydrase enzymes, proteins into amino acids by protease enzymes, and lipids into fatty acids and glycerol by lipase enzymes.
Enzymes are protein molecules that act as catalysts to speed up biological reactions by lowering the activation energy needed. They have specific active sites that substrates bind to, either breaking substrates apart or joining them together. The structure of the active site determines the specific substrate an enzyme can act on. While the lock and key model depicted a simple binding, the induced fit model better explains how enzymes and substrates may slightly change shape to promote reactions. Environmental factors like temperature, pH, and cofactors can impact an enzyme's activity by potentially denaturing its structure.
The document summarizes the key aspects of the digestive system. It describes how the digestive system prepares food for use by all body cells through digestion. It then outlines the main parts and functions of the digestive tract, from the mouth through the esophagus, stomach, small and large intestines. The document also discusses the roles of accessory organs like the liver, gallbladder and pancreas in producing digestive enzymes and chemicals.
The document discusses the human digestive and nutrition systems. It explains that nutrients from food are broken down into smaller molecules that can be absorbed and used by the body. The digestive system breaks food down mechanically and chemically. Accessory organs like the liver and pancreas produce enzymes and bile that aid digestion. Food passes through the esophagus, stomach, and small and large intestines as it is broken down and absorbed. Undigested waste is eliminated as feces.
AQA AS Biology - Unit 1 - Biology and Disease - Chapter 2 (2.1 and 2.4) - Dig...Pırıl Erel
Slides specifically for AQA syallbus during A-Levels, this is for unit 1 - biology of disease - chapter 2 (specifically 2.1 and 2.4) I believe these chapters go hand in hand, I have made these for my students and they have found them very useful.
Slides aimed for teachers, but can be used as revision slides for students also.
More than welcome to download, good luck with exams!
Millie, a 3 month old girl, was brought to the pediatrician with issues feeding, irritability, and muscle spasms. Tests found she had no GALC enzyme activity and an MRI showed demyelination. She was diagnosed with Krabbe disease, a rare inherited disorder caused by mutations in the GALC gene resulting in myelin loss and impaired nervous system development. There is currently no approved treatment, but research is exploring inhibitors of enzymes involved in the disease process.
Enzymes catalyze biochemical reactions and are characterized by their catalytic activity. The document discusses several key aspects of enzyme mechanisms and kinetics, including:
1) Enzymes have an active site that binds substrates and facilitates chemical reactions through proximity, orientation, and catalytic groups like metal ions or amino acid residues.
2) Michaelis-Menten kinetics describe the relationship between substrate concentration, reaction rate, and parameters like Vmax and Km.
3) Common metalloenzymes contain catalytic metal ions like zinc, copper, iron and manganese that participate in redox reactions.
Learn more about digestive enzymes!
Enzymes are a type of protein that bring about chemical changes. Digestive enzymes are one form of these in the body, and they are also naturally present in plant-based foods, including fruit and vegetables.
Digestive enzymes help to break foods down, making them easier to digest and allowing nutrients to be absorbed.
There are a number of reasons for a lack of enzymes, such as eating a diet lacking in enzymes (such as processed fast foods etc). This can lead to partially digested food, toxin build-up and symptoms such as bloating, stomach ache and indigestion.
You can help your digestive enzymes levels by eating more enzyme-rich foods, avoiding hard-to-digest foods (such as meat or dairy) and by taking a high quality digestive enzymes supplement, derived from plant sources.
Specialist Supplements Ltd are based in the UK and have been supplying health clinics, detox spas, colonic hydrotherapists, surgeries, health stores and the public with high potency, GMP-manufactured health products and organic foods since 1995.
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The fact fact fact is all about design facts which was used to present during 11th designer's meetup chennai, the whole event was powered by Photoshop User Group Chennai.
The lymphatic system transports lymph fluid and immune cells throughout the body. It is composed of lymphatic vessels, lymph nodes, the spleen, thymus, tonsils, adenoids, and bone marrow. Lymph fluid is collected from tissues by lymphatic capillaries and transported to lymph nodes where immune cells filter out pathogens and debris. The lymph then drains into the subclavian veins or thoracic duct to return to systemic circulation. Key functions of the lymphatic system include fluid homeostasis, absorption of fats from the intestine, and immune defense.
The document defines key terms related to enzymes including substrate, active site, and cofactors. It describes the lock and key and induced fit models of how enzymes bind to substrates. Environmental factors like temperature, pH, and substrate concentration can affect the rate of enzymatic reactions. Cofactors and coenzymes are required for some enzymatic reactions. Competitive and noncompetitive inhibitors can regulate enzyme activity. Examples are given of enzymatic uses in industry, detergents, food, and diagnosing/treating diseases.
Disclaimer: This presentation has nothing to do with the movie ‘50 shades of grey’ please do not misinterpret.
Why the title is so personal; why should I share my experience about my design career?
Before I let you know the answer you should know little things about me, I would love to introduce myself as an engineering graduate; yes an engineer who engineered himself as a designer.
I don’t have design degree I’m a self-taught designer and I don’t settle in learning new things because I don’t have that black hat with a tassel which every degree holder has.
How many of you feel that you’re an engineer and you are struggling to chase your dreams?
Coming back to the title; this presentation is so personal because it will make you relate yourself and you can see some of your shades in me.
__
If you like it; please share this presentation.
Thank you.
Enzymes are biological catalysts that speed up chemical reactions without being used up in the process. They do this by lowering the activation energy of reactions, allowing substrates to more easily bind and undergo chemical transformations into product molecules. Enzymes have an active site that binds specifically to substrates and induces a shape change that brings reactants together to form new compounds.
This is a PowerPoint presentation for Topic 1 in the Edexcel Biology B A Level course that starts in 2015.
This is a free sample, the full PowerPoint presentation is available to purchase here: https://sellfy.com/MrExham
Dr. B. Victor presented on the biochemical principles of enzyme action. Some key points include: enzymes are proteins that act as catalysts to lower the activation energy of biochemical reactions; they have an active site that binds specifically to substrates; the lock and key and induced fit models describe how enzymes and substrates interact; factors like temperature, pH, and inhibitors can impact an enzyme's activity level; and coenzymes, isoenzymes, and allosteric enzymes are types of modified enzymes. Dr. Victor has over 30 years experience teaching biochemistry and guiding PhD students.
Digestion and absorption of carbohydrateHerat Soni
This document summarizes the digestion and absorption of carbohydrates. It states that carbohydrates in the diet are primarily complex polysaccharides that are broken down by enzymes into monosaccharides in the gastrointestinal tract. The breakdown process begins in the mouth with salivary amylase and continues in the pancreas with pancreatic amylase and in the small intestine with enzymes that break down disaccharides into monosaccharides. Only monosaccharides can be absorbed into the intestinal cells, primarily through co-transport with sodium ions. The monosaccharides are then released into the bloodstream through facilitated diffusion transporters.
The lymphatic system is a part of the circulatory system, comprising a network of conduits called lymphatic vessels that carry a clear fluid called lymph unidirectionally toward the heart.
Disorders and diseases of the digestive systemalexmikajamir
This document discusses disorders and diseases of the digestive system. It describes common disorders like diarrhea, constipation, and irritable bowel syndrome. It also outlines diseases such as GERD, esophagitis, peptic ulcers, gastritis, and colon cancer. Technologies for monitoring the digestive system are also covered, including endoscopy, CT scans, MRIs, and ultrasounds. Various laboratory tests to diagnose digestive issues are mentioned as well, such as stool tests, anorectal manometry, and gastric manometry.
AS Level AQA unit 1: Topic 3 Movement In and Out of Cellssupe-saiyan
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2. Carbohydrates include sugars, starch and cellulose. Lipids include fats, oils, and phospholipids. Proteins are made of amino acids linked by peptide bonds. Nucleic acids like DNA and RNA are made of nucleotides.
3. These molecules are the building blocks of life and perform important functions in organisms like energy storage, structure, catalysis and information transfer.
The document summarizes key concepts about macromolecules and their building blocks. It discusses the four major macromolecules - carbohydrates, lipids, proteins, and nucleic acids - and their monomers, polymers, and functions. It also covers polymerization and hydrolysis reactions, as well as enzyme catalysis and factors that affect reaction rates.
The document compares the abilities of the human eye, light microscope, and transmission electron microscope. It then discusses the levels of organization in living organisms from the molecular to cellular level. It explains that cells need to maintain adequate concentrations of molecules to facilitate chemical reactions and cell functioning, and that organelles help compensate for the large volumes of eukaryotic cells.
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1. Organic compounds are made up of carbon along with hydrogen, oxygen, and sometimes nitrogen, phosphorus, and sulfur. They make up all living things.
2. Carbon can form chains and rings by bonding through single, double, or triple covalent bonds. Very large molecules called macromolecules are formed when many smaller molecules bond together.
3. Polymers are large molecules composed of many repeating smaller molecule units called monomers. They are formed through a process called dehydration synthesis which requires the removal of a water molecule.
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- The main parts of an atom and differences between ionic and covalent bonding.
- Representation of covalent bonds through electron dot structures and molecular formulas.
- Key properties of water including its polarity, hydrogen bonding, and role as a universal solvent.
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All living things are primarily composed of large biomolecules called biomolecules, which are made up of many atoms bonded together. Biomolecules contain carbon and are classified into four main types: carbohydrates, lipids, proteins, and nucleic acids. Carbohydrates include sugars and starches, lipids are fats and oils, proteins are made of amino acids, and nucleic acids include DNA and RNA. These macromolecules are essential for life and perform important functions in cells and organisms.
This document provides information on various biomolecules including water, carbohydrates, lipids, proteins, and nucleic acids. It discusses the structure and functions of these molecules. For water, it notes that water makes up 75% of the human body and acts as a solvent. It also provides sample exam questions related to water concentration. For carbohydrates, it describes monosaccharides, disaccharides, and polysaccharides like starch, cellulose, and glycogen. It discusses lipid structure including fatty acids, phospholipids, and cholesterol. For proteins, it covers primary, secondary, tertiary, and quaternary structure as well as conjugated proteins. Finally, it summarizes nucleic acid structure and DNA/RNA components and functions
Bacteria have basic nutritional requirements including a source of energy, nitrogen, carbon, oxygen, phosphorus, sulfur, minerals, and water. The sources of these nutritional requirements define an organism. Many bacteria can synthesize molecules from basic minerals, while others require preformed organic molecules. Bacterial cells are composed primarily of carbon, oxygen, nitrogen, hydrogen, phosphorus, and other minor elements. These elements are obtained from various sources and serve important functions in bacterial cells.
The document outlines the daily agenda for a biology class, which includes reviewing biomolecules and enzymes, cloze practice, a game called Trashketball, and a daily quiz. The agenda also lists homework assignments to complete the released biology form questions and read a chapter in the textbook.
Most of the world's population is lactose intolerant because they lack the enzyme lactase as adults. There are different types of lactose intolerance, including primary lactase deficiency which is genetic and affects adults, secondary deficiency caused by intestinal injury, and congenital deficiency present from birth. Lactose intolerance is caused by a lactase deficiency rather than an immune response like milk allergy.
This document provides an overview of organic and inorganic compounds, categories of organic compounds including carbohydrates, proteins, lipids, and nucleic acids. It describes the basic structures and functions of these biomolecules, such as carbohydrates being the primary energy source and made up of sugars/starches with a carbon, hydrogen, oxygen ratio of 1:2:1. Proteins are made of amino acids that form peptide bonds, and enzymes are protein catalysts. Lipids include fats/oils and have energy storage and membrane roles. Nucleic acids DNA and RNA are made of nucleotides containing sugars, phosphates, and nitrogen bases that form base pairs.
1. The document provides information about biomolecules including carbohydrates, proteins, lipids and enzymes.
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2. Digestive System
What is ingestion?
A: when your body takes in food
What is digestion?
A: breaking larger molecules into small, soluble ones
What is absorption?
A: the uptake of small molecules and water
What is assimilation?
A: when absorbed small molecules are built up to larger molecules to
make cells or cell components or are broken down for energy
3. Digestive System
What is the role of the mouth?
A: (starts carbohydrate digestion) amylase in saliva breaks down starch into maltose
What is the role of the oesophagus?
A: to carry food to the stomach by peristalsis
What is the role of the stomach?
A: to produce enzymes and acid, and store and digest food
What does the mucus in the stomach lining prevent
A: the enzymes digesting the stomach
What is the role of the small intestine?
A: to absorb products of digestion into bloodstream
How is the small intestine adapted to this function?
A: contains villi and microvilli to increase surface area and maximise rate of absorption
What is the role of the pancreas and salivary glands?
A: to produce enzymes. The salivary glands produces amylase and the pancreas produces all 3
4. Digestive Enzymes
What is physical/mechanical digestion?
A: when large foods are broken down to smaller foods via the teeth-
What is an advantage of this?
A: this allows a larger surface area for chemical digestion
What is chemical digestion?
A: breakdown of large insoluble molecules into small soluble molecules by enzymes via hydrolysis
What is hydrolysis?
A: when water is added to break the bond between molecules
Name the 3 main digestive enzymes
A: Carbohydrase, lipases, proteases
What does Carbohydrase break down and to what?
A: starch to maltose
What does lipase break down and to what?
A: lipids to fatty acids and glycerol
What does protease break down and to what?
A: proteins to amino acids
5. Coeliac Disease
How is the microvilli of people with coeliac disease damaged?
A: large substances like proteins can get through the lining of the small
intestine
As a result why can’t diffusion occur properly?
A: the surface area is less and the rate of diffusion is reduced
6. Monosaccharides
What are monomers?
A: monomers are the building blocks of a large polymer. They are small
molecules ‘fused’ together in a series of condensation reactions to form a
polymer.
What are polymers?
A: chains made of monomers
What four elements are polymers made of? (CHON)
A: carbon, hydrogen, oxygen and nitrogen
What is a monosaccharide?
A: individual monomer units from which all carbohydrates are built.
7. Monosaccharides
Give 3 properties of monosaccharides
A: They’re all reducing sugars, sweet and soluble
What do 2 monosaccharides form?
A: disaccharide
What is the general formula for a monosaccharide?
A: (CH2O)n (where n can be any number from 3-7)
What is the name of the bond between two monosaccharides?
A: glyosidic
How is the glyosidic bond formed?
A: in a condensation reaction- the removal of water
8. Reducing Sugars
What is a reducing sugar?
A: a sugar that reduces its electrons by donating them to benedict’s reagent or
another chemical (all monosaccharides)
What is the name of the test for a reducing sugar?
A: benedict’s test
Describe the test for a reducing sugar
A: add equal volumes of the sample solution and benedict’s reagent in a test tube
and heat for it five minutes in a water bath.
What is the indication for a positive result?
A: brick red/orange colour
What is the indication for a negative result?
A: blue
9. Non-Reducing Sugars
What are non-reducing sugars?
A: sugars that don’t reduce the benedict’s solution, so you need to break
them down first.
After receiving a negative result from the benedict’s test, why would you add
2cm3 of hydrochloric acid to the solution?
A: to hydrolase any spare disaccharides into monosaccharides.
After the hydrochloric acid why would you add sodium hydrogen to the
solution?
A: to neutralise the acid
What do you do after this step?
A: do the reducing sugar test again (heat the solution again with benedict’s
reagent)
10. Disaccharides
Name 3 common disaccharides
A: maltose, sucrose, lactose
What forms to make maltose?
A: glucose + glucose
What forms to make sucrose?
A: glucose + fructose
What forms to make lactose?
A: glucose + galactose
What is a condensation reaction?
A: when water is removed to make the glyosidic bond between two monosaccharides
Why can’t disaccharides be absorbed into the blood?
A: they’re too large
11. Polysaccharides
How are polysaccharides formed?
A: when 3 or more monosaccharides form together
Why are polysaccharides suitable for storage?
A: they are large and insoluble
What are the 3 main types of polysaccharides?
A: starch, cellulose and glycogen
Describe and name the test for starch?
A: iodine test; 2cm3 of sample solution and same volume of iodine
What indication shows a positive result?
A: blue/black colour
What indication shows a negative result?
A: yellow
12. Starch
Give 3 properties starch molecules have
A: insoluble, compact, osmotically inactive
What 2 compounds is starch a mixture of?
A: amylose and amylopectin
Describe the structure of amylose
A: 1,4 glyosidic bonds, un-branched compact chains of a-glucose that form a helix
Describe the structure of amylopectin
A: 1,6 glyosidic bonds, branched chains of a-glucose molecules
Why can glucose from amylopectin be hydrolysed quicker?
A: glucose can only be released from the ends of the chains and amylopectin has branched chains where the
glucose is easier to reach
What disaccharide unit is starch broken into and by which enzyme?
A: into maltose by amylase
What monosaccharide unit is maltose broken into and by which enzyme?
A: glucose by maltase
13. Starch Digestion
What happens to starch in the mouth?
A: saliva containing amylase hydrolyses the starch into maltose
What happens to starch once it reaches the small intestine?
A: further hydrolysis of the starch occurs by amylase and then the maltase on
the epithelial lining breaks maltose into glucose because there is no use for
maltose
What is the ileum?
A: the epithelial cells lining the small intestine
However, when food enters the stomach what does the acid do to amylase?
A: it denatures the enzyme amylase so further hydrolysis of the starch can’t
occur
14. Lactose Intolerant
Where is lactose found?
A: milk products
Why can’t lactose be digested?
A: it is a disaccharide (too big)
Why don’t some adults produce the enzyme lactase?
A: their diet doesn’t contain enough milk so their body outgrows the production of the enzyme or it’s due to a
faulty gene
How does a person become lactose intolerance?
A: when their bodies consume more lactose than lactase can digest
What happens do the undigested milk (lactose)?
A: it reaches the large intestine where microorganisms break it down
Why do people who are lactose intolerant get diarrhoea?
A: the water potential is lowered by the small soluble substances, therefore water moves in naturally by
osmosis from the epithelial cells
15. Proteins
What do amino acids make up?
A: a polypeptide chain of a protein
What is the bond called between 2 amino acids
A: peptide
What four elements are amino acids made from?
A: carbon, hydrogen, oxygen and nitrogen (sometimes sulphur)
What forms the primary structure?
A: the order/sequence of amino acids in a polypeptide chain
What does the primary structure determine?
A: the overall shape and function of the protein
Describe the relationship between the protein’s shape and its function
A: they are specific to each other
16. Protein Structure
How is the secondary structure formed?
A: when the primary structure has further coil and pleats
What 2 types of common secondary structures are there?
A: a-helix and beta pleated
What bonds are secondary structures held with?
A: weak hydrogen bonds formed between the –NH and –C=O groups in the amino acids
How is the 3D tertiary structure formed
A: from further coil and pleats of the secondary structure
What bonds hold the tertiary structure together?
A: disulphide bridges, ionic bonds and hydrogen bonds
How is the quaternary structure formed?
A: when 2 or more polypeptide chains link together
17. Protein Denaturation
When can a protein become denatured?
A: high temperature or changes in pH
Which bonds break due to high temperatures and why?
A: hydrogen because they’re weak
Why don’t disulphide and ionic bonds break to high temperatures?
A: they’re stronger and can withhold high temperatures
What can break the ionic bonds?
A: strong acids and alkalis and detergents and solvents
What happens when the tertiary structure is broken?
A: it loses its function
Why is this particularly important for denaturing in enzymes?
A: when the shape of the active site is altered the substrate can no longer fit in
18. Test for Proteins
What is the name for test for proteins and what does this detect?
A: biuret test- it detects for peptide bonds
Describe the biuret test in 2 steps
1) sample solution and sodium hydroxide in a tube
2) Mix this with 0.05% of dilute copper sulphate solution
What does a positive indication show?
A: a purple colour
What does a negative indication show?
A: blue
19. Fibrous Proteins
Name 2 types of basic protein shapes
A: fibrous and globular
What is the overall function of fibrous proteins?
A: structural functions
What kind of tertiary structure are in fibrous proteins?
A: alpha helix
Describe the basic structure of a fibrous protein
A: long chains that run parallel to one another
What kind of bonds are in the fibrous proteins?
A: polypeptides linked by cross bridges
What is the solubility of fibrous proteins
A: insoluble
Give 2 examples of a fibrous protein and where is it found
A: collagen, and is found in bone tendons. Keratin, found in hair and nails
20. Globular Proteins
What is the overall function of globular proteins?
A: metabolic functions
What is the basic structure of globular proteins?
A: round, and deeply folded
What kind of tertiary structure are globular proteins?
A: alpha helix and beta pleated
What is the solubility of globular proteins?
A: soluble
What kind of bonds hold the tertiary structure together?
A: hydrogen, ionic, disulphide bridges
Name examples of globular proteins
A: antibodies, enzymes, insulin and haemoglobin
21. Enzymes
What are enzymes?
A: biological catalysts that speed up the rate of reactions inside living things
without being used up themselves
How is an enzyme-substrate complex formed?
A: the enzyme has a specific shaped active site complementary to the shape
of the substrate molecule so they bind
What is the activation energy?
A: the minimum amount of energy required to start a reaction
Why happens at the beginning of the reaction?
A: the bonds of the substrate are broken first in order for them to be
changed into products- an E-S complex is formed
22. Enzyme Models
What does the lock and key method explain?
A: that enzymes have a rigid shape and the substrate is the exact complementary shape to
the active site.
What is a limitation of this model?
A: it explains how the enzyme is a rigid structure but doesn’t explain how its active site can
change when other substances bind to the enzyme
How is the induced-fit model a better explanation of scientific observations?
A: it explains how other molecules can change the shape of the enzyme and how the
activation energy is lowered
Describe the induced-fit model
A: the enzyme isn’t’ rigid but flexible. It moulds itself around the substrate in order to bind
How does an enzyme lower the activation energy in a substrate?
A: when it changes shape to bind to the substrate it puts strain on the substrate which
distorts a bond and lowers the energy to break that bond
23. Factors Affecting Enzymes
What does the effect of pH have on enzymes?
A: as this alters the charge on the amino acids in the active site and the substrate can no longer bind and make
enzyme-substrate complexes
How can the effect of a small temperature increase have on enzymes?
A: as temperature increases the kinetic energy increases, which increases the amount of collisions and more E-S
complex form
Describe what happens in the tertiary structure when the temperature increase is too high?
A: the atoms vibrate rapidly and the hydrogen bonds break. Reducing the number of E-S complex and causing the
tertiary structure to change
What is the effect of enzyme concentration on the rate of reaction?
A: the rate of reaction is directly proportional to the enzyme concentration- there are no limiting factors
What is the affect of substrate concentration on the rate of reaction?
A: initially it will increase the rate of reaction until the active site are all in use as the concentration increases, so
now the number of enzymes limit the rate of reaction
What is a buffer solution and how does it work?
A: maintains the pH by absorbing H+ ions when the solution is too acidic and releasing H+ ions when the solution is
too alkaline
24. Inhibitors
How do competitive inhibitors affect enzyme activity?
A: they are a similar shape to the substrate so they slow down activity by
competing for the active site
Where do these inhibitors bind?
A: the active site
How can these inhibitors be overcome?
A: by increasing substrate concentration
How do non-competitive inhibitors affect enzyme activity?
A: they stop activity by changing the shape of the active site so substrate molecules
can no longer fit
Where does this inhibitor bind?
A: the allosteric site