A-LevelBiologyEnzymes9700/12 · May/June 2022 · Q121 Mark
Which statement about the Michaelis–Menten constant (Km) is correct for an enzyme with a low affinity for its substrate?
AIt has a high Km and reaches Vmax at a high substrate concentration.
BIt has a high Km and reaches Vmax at a low substrate concentration.
CIt has a low Km and reaches Vmax at a high substrate concentration.
DIt has a low Km and reaches Vmax at a low substrate concentration.
✓ Correct answer
A: It has a high Km and reaches Vmax at a high substrate concentration.
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