O-LevelBiologyEnzymes5090/11 · May/June 2025 · Q101 Mark
What are features of enzymes? 1 They act on specific substrates. 2 They are carbohydrates. 3 They are catalysts. 4 They are involved in some, but not all, metabolic reactions.
A1, 2 and 3
B1 and 3 only
C1 and 4
D2, 3 and 4
✓ Correct answer
B: 1 and 3 only
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