Biology Revision AS Unit 2

Biological Molecules
Biochemistry and Metabolism

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Name 6 Chemical groups:
CLUE- All organisms are made up of thousands of different molecules, in order to survive an organism must be able to make, or take in the molecules required.
- Carbohydrates
- Proteins
- Lipids/Fats
- Vitamins and minerals
- Nucleic acids
- Water
What is the role of carbohydrates within an organism?
- Energy storage
- And sometimes structure
Name 5 roles of proteins within an organism?
- Structure
- Transport ( Membranes )
- Enzymes
- Antibodies
- Hormones
Name 5 roles of lipids within an organism?
- Membranes
- Energy supply
- Thermal insulation
- Protective layers/padding
- Electrical insulation in neurones (Myelin sheath)
What is the role of vitamins and minerals within an organism?
- They form some parts of larger molecules and take part in some metabolic reactions.
- Some act as Co-enzymes or enzyme activators.
What is the role of Nucleic acids within an organism?
- INFORMATION molecules
- E.g DNA
- Carry the instructions for life!
What is the role of water within an organism?
- It takes part in many reactions
- Helps support plants
- It is a solvent = a medium for most metabolic reactions
What is a risk factor?

Something that increases your chance of developing a particular disease.
The KEY biological molecules are:
- Carbs
- Lipids/ Fats
- Proteins
- Nucleic acids
Name the main chemical elements found in there molecules...
- Carbon
- Hydrogen
- Oxygen
- Nitrogen

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Biology Revision AS Unit 2

Description

Revision for January Resit biology exam.

Updated

2010-11-19T17:56:59Z

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