Quelpr
2 marksRespiration

CSEC Biology · May/June 2011 · Paper 2 · Question 2(a)(ii)

Humans cannot survive long in a room with limited oxygen.

Write a chemical equation which summarizes the process for which oxygen is required in living cells.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 2(a)(i)Suggest ONE reason why humans need oxygen to stay alive.[1 mark]
  2. 2(a)(iii)Name the process at (a) (ii) above.[1 mark]
  3. 2(a)(iv)In which cell organelle does the process at (a) (iii) take place?[1 mark]
  4. 2(b)(i)During his spectacular sprint, Usain Bolt's muscle cells became starved of oxygen. Explain why this happens in exercising muscles.[3 marks]
  5. 2(b)(ii)What substance is produced in Bolt's muscles which were starved of oxygen?[1 mark]
  6. 2(b)(iii)Explain how the substance in (b) (ii) above could affect Bolt's performance if he continued running for another 10 minutes.[2 marks]
  7. 2(c)(i)Some plant species are able to survive in conditions where oxygen is lacking. Name the process by which these plants get their energy.[1 mark]
  8. 2(c)(ii)Describe the process named in (c) (i) above and state TWO substances produced by this process.[3 marks]

More practice: the rest of this paper · more Respiration questions · all CSEC Biology past papers