Biology 9700 · AS & A Level · Factors that affect enzyme action

Factors that affect enzyme action — practice question

The diagram illustrates the mass of product formed over time in three reactions that use the same substrate and enzyme. The volumes of substrate and enzyme, together with the temperature, were kept the same in each reaction. Which statement accounts for the difference in these reactions?

  • AThe pH in reactions 2 and 3 has denatured the enzyme.
  • BThere is a non-competitive inhibitor present in reaction 3.
  • CThere is the highest concentration of enzyme in reaction 1.
  • DThere is the highest concentration of substrate in reaction 1.

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