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2 marksCellular Respiration and ATP Synthesis

CAPE Biology Unit 2 · May/June 2021 · Paper 2 · Question 1(b)(i)

Energy is required to metabolize nitrogen compounds in organisms. Under anaerobic conditions, the respiratory pathway varies by organism.

State TWO similarities between fermentation (anaerobic respiration) reactions in animals and yeast.

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Other parts of this question

  1. 1(a)(i)In the space below, construct a table to represent the data given in Figure 1.[5 marks]
  2. 1(a)(ii)Identify the processes labelled A-E in Figure 2.[5 marks]
  3. 1(a)(iii)Animals may also be involved in the nitrogen cycle. Extend the diagram in Figure 2 to illustrate the involvement of animals in the nitrogen cycle.[3 marks]
  4. 1(b)(ii)Explain the function of the fermentation reactions in organisms.[3 marks]
  5. 1(c)(i)Discuss the importance of the following components of oxidative phosphorylation: The formation of a proton gradient.[12 marks]
  6. 1(c)(ii)Discuss the importance of the following components of oxidative phosphorylation: The synthesis of ATP.[12 marks]
  7. 1(c)(iii)Discuss the importance of the following components of oxidative phosphorylation: The role of oxygen.[12 marks]

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