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The graph shows the effect of pH on the activity of an enzyme - OCR Gateway - GCSE Biology (Combined Science) - Question 4 - 2021 - Paper 1
Question 4
The graph shows the effect of pH on the activity of an enzyme. What is the optimum pH of this enzyme? A pH2 B pH4 C pH6 D pH8 Your answer
Worked Solution & Example Answer:The graph shows the effect of pH on the activity of an enzyme - OCR Gateway - GCSE Biology (Combined Science) - Question 4 - 2021 - Paper 1
Step 1
What is the optimum pH of this enzyme?
Answer
To determine the optimum pH for enzyme activity, refer to the peak of the enzyme activity graph provided.
The graph indicates that the enzyme activity is highest at a certain pH level, which is typically where the curve peaks. Based on the options available:
- pH2: Low enzyme activity.
- pH4: Moderately low activity.
- pH6: Highest activity as indicated by the peak.
- pH8: Decrease in activity.
Thus, the correct answer is C pH6, as this represents the optimum pH for enzyme activity.