4.2 Respiration

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Question 6
Medium

This question is about aerobic and anaerobic respiration.

a.

During anaerobic respiration in yeast cells, pyruvate is decarboxylated and reduced. What are the final end-products of this metabolic pathway?

  • Lactate and ATP
  • Ethanol and carbon dioxide
  • Lactate and carbon dioxide
  • Ethanol and water
[1]
b.

Why is oxygen needed by cells during aerobic respiration?

[1]
c.

In which region of a mitochondrion does the electron transport chain take place?

  • Outer membrane
  • Inner membrane (cristae)
  • Matrix
  • Intermembrane space
[1]
d.

Describe how you would use a respirometer to measure the rate of oxygen consumption in a sample of active woodlice, and state one safety precaution you would take with its reason when preparing the apparatus.

[4]

4.2 Respiration Questions

  1. GCSE
  2. /Biology
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