Biology Unit 4

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  • Created by: Sacha
  • Created on: 10-06-13 18:54

1. The type of ATP synthesis that takes place in cells when phosphate groups are transferred from donor molecules to ADP to make ATP is called ______?

  • Substrate-level phosphorylation
  • Photophosphorylation
  • Oxidative phosphorylation
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2. Why is ATP sometimes referred to as the 'immediate energy source' of the cell?

  • The energy released is used up very quickly
  • The instability of the phosphate bonds means that it is broken down very quickly and easily
  • A lot of it is stored in the cell at any one time

3. These periodic popuation decreases create what is known as __________?

  • Selection pressure
  • Root pressure
  • Negative pressure

4. Which of the following processes is energy required for?

  • Metabolism, movement and active transport
  • Diffusion
  • Osmosis

5. Name one problem with using pyramids of biomass?

  • Only shows organisms present at a particular time - seasonal differences are not shown
  • No account taken of size - one giant tree is the same size as one greenfly on the pyramid

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