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O-LevelBiologyEnzymes5090/11 · May/June 2025 · Q91 Mark

The enzyme amylase catalyses the breakdown of starch into maltose. The effect of different pHs on the time it took for this breakdown to occur when all other variables were controlled was investigated. Which graph shows the results of this investigation?

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

AGraph A
BGraph B
CGraph C
DGraph D

✓ Correct answer

D: Graph D

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About this question

Topic
Enzymes, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source
O-Level Biology, May/June 2025 Paper 1 Variant 1, question 9.

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