Question 13
FAn athlete runs fast for 10 minutes. She then rests for 30 minutes.
Scientists measure the concentration of lactic acid in her blood.
The Figure shows the results.
Figure
a.[1]
Use the Figure to give the concentration of lactic acid at 10 minutes.
b.[2]
Describe how the concentration of lactic acid changes between 0 and 40 minutes.
Use data from the Figure in your answer.
c.[3]
Explain why the concentration of lactic acid increases while the athlete is running.
1.3 Respiration Questions
113 exam-style questions on OCR GCSE Biology 1.3 Respiration, covering 1.3.1 Cellular respiration supplies ATP, 1.3.2 Aerobic and anaerobic respiration, 1.3.3 Sugars and carbohydrates, 1.3.4 Amino acids and proteins, and 1.3.5 Fatty acids and lipids. Each one has a worked solution and a mark scheme showing where the marks go.