5.1 Aerobic respiration

Question 1

Explain why cells respond to hypoxia with an increase in the rate of glycolysis

Answer 1

• (because if conditions are hypoxic) there is not much oxygen available to act as a terminal electron acceptor (1)
• therefore the electron transport chain will not operate (1)
• therefore ATP production by oxidative phosphorylation will be reduced (1)
• ATP is produced (directly ) during glycolysis (during these
  anaerobic conditions) (1)