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6. Which of the following is not needed for photosynthesis
- Water
- Oxygen
- Light
- Carbon dioxide
- Chlorophyll
7. Why will a plant not photosynthesise at all if it is kept at a constant 200C?
- All the minerals in the soil will be too hot for the plant to use.
- It will sweat and lose too much moisture
- The enzymes will become denatured
- The cells will have too much energy
8. Why to plants need magnesium?
- To make seeds
- To make chlorophyll
- Growth and repair
- To make fertilisers
9. What is an argument against keeping animals in cramped conditions?
- You need bigger farms and barns, which is more expensive.
- The animals won
- It spreads diseases more easily.
- The animals get claustrophobia.
10. What are enzymes?
- Particles that help you absorb your food.
- Biological catalysts
- Cells in the stomach
- Detergents.
11. Which is an example of breaking down food physically?
- Absorbing excess water
- Stomach acid breaking down food
- Chewing food
- Swallowing
12. Which enzyme breaks down starch into sugars?
- Bile
- Amylase
- Glucose
- Lipase
13. Protease breaks down protein into....
- Amino acids
- Energy
- Fatty acids and glycerol
- Simple sugars, eg fructose
14. Which of these statements about bile is false?
- It emulsifies fats
- It is made in the liver and stored in the gall bladder
- It is an enzyme
- It neutalises stomach acid
15. When yeast respires anaerobically, it produces
- beer
- ethanol
- lactic acid
- wine