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

Factors that affect enzyme action — practice question

The graph presents the findings from two experiments investigating how raising substrate concentration affects the rate of an enzyme-catalysed reaction. In one experiment, the enzyme concentration was high, whereas in the other it was low. Every other variable was kept constant. What would be the limiting factor for the initial rate of reaction at point X?

  • Aenzyme concentration
  • BpH
  • Csubstrate concentration
  • Dtemperature

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