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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