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Energy for biological processes

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Question 9

The respiratory quotient (RQ) of a respiring organism or tissue can indicate the type of respiratory substrate being used and whether anaerobic respiration is occurring.

a.

State the equation used to calculate the respiratory quotient (RQ).

[1]
b.

Table 1.1 shows the RQ values of an athlete measured during exercise at three different power outputs.

Power Output (W)Respiratory Quotient (RQ)
200.98
1000.72
2801.30

Using the data in Table 1.1, conclude what type of respiratory substrate is being used or what type of respiration is occurring at:

  • 20 W
  • 100 W
  • 280 W
[3]

Energy for biological processes Questions

  1. A Level
  2. /Biology
  3. /Energy for biological processes