A-LevelBiologyEnzymes9700/12 · Feb/Mar 2019 · Q151 Mark
The graph shows the effect of substrate concentration on the initial rate of an enzyme-catalysed reaction. The enzyme concentration is constant. [Figure shows a graph of initial rate of reaction vs substrate concentration with points R, S, T] Which statement about the graph is correct?
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ABetween R and S the number of enzyme molecules is limiting the rate of reaction.
BBetween R and S the number of product molecules is limiting the rate of reaction.
CBetween S and T the number of enzyme molecules is limiting the rate of reaction.
DBetween S and T the number of substrate molecules is limiting the rate of reaction.
✓ Correct answer
C: Between S and T the number of enzyme molecules is limiting the rate of reaction.
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