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O-LevelBiologyEnzymes5090/12 · Oct/Nov 2022 · Q51 Mark

Fats are broken down by the enzyme lipase to produce fatty acids and glycerol. According to the 'lock and key' model of enzyme action, what is the 'lock' and what is the 'key' in this reaction?

Alock: fats, key: lipase
Block: lipase, key: fats
Clock: fats, key: fatty acids and glycerol
Dlock: lipase, key: fatty acids and glycerol

✓ Correct answer

B: lock: lipase, key: fats

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About this question

Topic
Enzymes, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source
O-Level Biology, Oct/Nov 2022 Paper 1 Variant 2, question 5.

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