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4 marksRespiration

CSEC Biology · January 2011 · Paper 2 · Question 4(b)(i)

During intense exercise, there is an insufficient supply of oxygen to muscles for aerobic respiration.

Give TWO characteristics of aerobic respiration.

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Other parts of this question

  1. 4(a)(i)Using a diagram to illustrate the circulatory system, describe how oxygenated blood from the lungs is distributed to organs and tissues.[7 marks]
  2. 4(a)(ii)Explain how oxygen becomes available to a muscle tissue for respiration.[7 marks]
  3. 4(b)(ii)In the absence of sufficient oxygen, anaerobic respiration occurs. Suggest ONE disadvantage of anaerobic respiration.[4 marks]
  4. 4(c)Transport vessels in plants have features that are similar to transport vessels in animals. Describe TWO ways in which xylem tissues are similar to blood…[4 marks]

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