A-LevelBiologyEnzymes9700/12 · Oct/Nov 2017 · Q161 Mark
Which statement about the effect of substrate concentration on the activity of an enzyme is correct?
AAbove a certain concentration of substrate an enzyme reaches its maximum rate of reaction.
BAt high concentration of competitive inhibitor increasing the substrate concentration has no effect.
CAt high substrate concentration a non-competitive inhibitor no longer affects the enzyme activity.
DThe higher the concentration of substrate the faster an enzyme can catalyse a reaction.
✓ Correct answer
A: Above a certain concentration of substrate an enzyme reaches its maximum rate of reaction.
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