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

Factors that affect enzyme action — practice question

In two investigations, the rate of an enzyme-catalysed reaction was measured when either a competitive inhibitor or a non-competitive inhibitor was present. What could happen to each rate of reaction if the substrate concentration is increased?

  • Awith competitive inhibitor: decreases; with non-competitive inhibitor: no change
  • Bwith competitive inhibitor: increases; with non-competitive inhibitor: decreases
  • Cwith competitive inhibitor: increases; with non-competitive inhibitor: no change
  • Dwith competitive inhibitor: no change; with non-competitive inhibitor: decreases

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