Biological molecules (Water and Proteins) and Transport in plants recap AS Biology [JM]
Upcoming SlideShare
Loading in...5
×
 

Biological molecules (Water and Proteins) and Transport in plants recap AS Biology [JM]

on

  • 657 views

Aim: To explore the structures and functions of different macromolecules ...

Aim: To explore the structures and functions of different macromolecules

Objectives by the end of this lesson SSBAT:
List the properties of water that make it essential to life.
Explain how the atomic structure of water affects its biological interactions.
Describe the properties of proteins and its structures

Statistics

Views

Total Views
657
Views on SlideShare
657
Embed Views
0

Actions

Likes
0
Downloads
1
Comments
0

0 Embeds 0

No embeds

Accessibility

Categories

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment
  • http://www.creative-chemistry.org.uk/molecules/

Biological molecules (Water and Proteins) and Transport in plants recap AS Biology [JM] Biological molecules (Water and Proteins) and Transport in plants recap AS Biology [JM] Presentation Transcript

  • Water and Proteins Jorge Melo
  •  Transpiration pull (negative pressure) Root pressure (positive pressure) Capillarity (small plants)2 important factors of the water:  Cohesion: H2O molecules tend to stick together  Adhesion: H2O molecules tend to stick to the inside of the xylem
  •  Leaves  Small to reduce the surface area  Thick to reduce surface area
  •  Sunken Stomata
  •  Thick waxy cuticles reduce water loss through the epidermis
  •  My relative molecular mass is 18g/mol. There is 1.26 million trillion tons of me on earth. I can be found as a solid, liquid, or gas. I make up 70% of human body. Two hydrogen and one oxygen.
  •  Aim: To explore the structures and functions of different macromolecules Objectives by the end of this lesson SSBAT: List the properties of water that make it essential to life. Explain how the atomic structure of water affects its biological interactions. Describe the properties of proteins and its structures
  •  Carbohydrates Functions Proteins Importance Lipids Sources
  •  Human body Many different types of molecules Such as: Biomolecules
  •  The most common is water
  •  2 H atoms 1 O atom covalent bonds O (δ-) H (δ+) hydrogen bonds Ice Vapour Liquid
  •  High specific heat capacity.  Temperature  Kinetic energy  4.1 KJ/°C High latent heat.
  •  High density. Surface tension and cohesion.
  •  Water can carry a wide range of substances in solution.
  •  Enzymes Amino acids Genetic code Structural/mechanical functions Meat, dairy products, soya, fish, beans, eggs
  • Proteins also form some of the entrances andexits through the cell.
  •  4 elements  C  H  O  N Basic unit: amino acid
  • Amino group-NH2 Carboxyl group - R group COOH
  • Condensationreaction
  • CondensationreactionLoss of 2 HatomsAnd loss of 1 O Polypeptide chain Ribosome
  • Hydrolysisreaction
  • Hydrolysis Condensation
  • Amino acid Polypeptide chain
  •  20 different AA Polypeptide may contain hundreds A change in one makes it a different protein
  •  Polypeptide chains do not lie in straight Some parts of the chain mayCoil into a regular pattern calledα-Helix Hydrogen bonds
  •  Disulphide bonds Ionic bonds Intermolecular interactions Hydrophobic bonds
  •  Globular protein
  •  Colagen Collagen
  • Fibrous proteins Globular proteinsStable structure Relative unstable structureInsoluble in water Soluble in waterStrength gives structural structures Metabolic functionsPolypeptide chains from long strands Polypeptide chains “roll up” into spherical shapeE.g. Collagen in bone and keratin in E.g. all enzymes , antibodies, somehair hormones (e.g. insulin), heamoglobin
  • Review 1. Which of the following suspects is a protein component?2. List some foods that provide proteins?3. How does my body use proteins?
  •  Aim: To explore the structures and functions of different macromolecules Objectives by the end of this lesson SSBAT: List the properties of water that make it essential to life. Explain how the atomic structure of water affects its biological interactions. Describe the properties of proteins and its structures