O-LevelBiologyEnzymes5090/11 · Oct/Nov 2013 · Q41 Mark
Which statements are correct for all enzymes? 1 They are proteins. 2 They are secreted into the alimentary canal. 3 They speed up biochemical reactions. 4 None of them work at low pH.
A1 and 3
B1 and 4
C2 and 3
D2 and 4
✓ Correct answer
A: 1 and 3
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