Technology, tool for complacency
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The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive function. Exercise causes chemical changes in the brain that may help protect against mental illness and improve symptoms.
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This document outlines key concepts and objectives related to genetics, genetic engineering, and biotechnology. It discusses techniques like PCR, gel electrophoresis, and DNA profiling. It also describes gene transfer methods using plasmids, restriction enzymes, and DNA ligase. Examples of genetic modification in animals and plants are provided. The document discusses cloning techniques, creating recombinant DNA, and potential benefits and ethical issues related to genetic engineering.
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B. Physiology Of Exercise I B
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2.3 eukaryotic cells
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Technology, Tool for Complacency
Created with Haiku Deck the free presentation app for iPad. Learn more and get Haiku Deck: www.haikudeck.com
Measuring lab
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3.2 Amino Acids And Peptide Bonds
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Option F. Microbes and biotechnology
1. Microbes play important roles in ecosystems by recycling nutrients and driving biochemical processes like the nitrogen cycle. Bacteria and archaea are involved in nitrogen fixation, nitrification, and denitrification.
2. Sewage treatment harnesses microbes to break down organic waste through aerobic and anaerobic digestion. Biofilms and microbial communities in trickling filters and reed beds lower the biological oxygen demand and remove nutrients from sewage water.
3. Anaerobic digestion by methanogenic archaea produces methane from organic materials like sewage sludge. The process occurs in three stages carried out by different microbial communities that convert waste to methane via intermediate products.
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B. Physiology Of Exercise I B
The skeleton provides a strong framework for the body and protects soft organs. It is made of bone and cartilage. Movement requires coordination of bones, muscles, tendons, and ligaments. Bones provide anchors for muscles and act as levers. Muscles contract to pull bones and cause movement, while tendons transmit force from muscles to bones and ligaments hold bones in place at joints. Nerves transmit signals to produce muscle contractions.
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This document discusses human nutrition and energy from food. It explains that energy comes from fats, carbohydrates, and proteins which are metabolized to power cell respiration. Staple foods that supply energy vary by culture and region depending on availability. Fats contain the most energy per gram, followed by carbohydrates then proteins. The type and amount of carbohydrates and fats consumed can impact health and risk of diseases like diabetes or obesity. Protein is only used for energy in excess of carbohydrate and fat intake.
2.3 eukaryotic cells
Eukaryotic cells contain a true nucleus and membrane-bound organelles, making them more complex than prokaryotic cells which only have a nucleoid. Eukaryotic cells first appeared later in Earth's history due to this increased complexity. The symbiont theory proposes that smaller unicellular organisms were engulfed by larger cells and eventually specialized to become organelles like mitochondria, as evidence by their similar size and own DNA. Eukaryotic cells range from 10 to 100 micrometers in size.
Technology, Tool for Complacency
Created with Haiku Deck the free presentation app for iPad. Learn more and get Haiku Deck: www.haikudeck.com
Measuring lab
This document describes procedures for measuring various properties including size distribution, mass distribution, concentration, temperature, and volume. The procedures involve carefully measuring samples and recording the measurements and observations. Key steps include choosing a representative sample, using proper measuring tools, accounting for errors and uncertainties, and recording all relevant data. The goal is to obtain large data sets that can be statistically analyzed to evaluate results and understand sources of error.
3.2 Amino Acids And Peptide Bonds
Amino acids are monomers that join together via peptide bonds to form polymer chains called polypeptides or proteins. There are 20 standard amino acids that make up human proteins. Amino acids have an amino group, a carboxyl group, and a unique R group that determines their properties. Forming a dipeptide from two amino acids is a condensation reaction that releases a water molecule. Breaking a dipeptide into its constituent amino acids requires hydrolysis and absorbs a water molecule. Longer chains of amino acids are called oligopeptides or polypeptides.
Option F. Microbes and biotechnology
1. Microbes play important roles in ecosystems by recycling nutrients and driving biochemical processes like the nitrogen cycle. Bacteria and archaea are involved in nitrogen fixation, nitrification, and denitrification.
2. Sewage treatment harnesses microbes to break down organic waste through aerobic and anaerobic digestion. Biofilms and microbial communities in trickling filters and reed beds lower the biological oxygen demand and remove nutrients from sewage water.
3. Anaerobic digestion by methanogenic archaea produces methane from organic materials like sewage sludge. The process occurs in three stages carried out by different microbial communities that convert waste to methane via intermediate products.