Biology 0610 · IGCSE · Enzymes

Enzymes — practice question

The graph illustrates the effect of temperature on enzyme activity. Which statements about the enzyme and substrate at temperatures 1 and 2 are correct?

  • ATemperature 1: The active site fits into the substrate of the enzyme. Temperature 2: The substrate changes shape so that it cannot fit into the active site.
  • BTemperature 1: The enzyme and substrate have the same shape. Temperature 2: The enzyme and substrate have different shapes.
  • CTemperature 1: The enzyme is denatured. Temperature 2: The enzyme and substrate have complementary shapes.
  • DTemperature 1: The substrate fits into the active site of the enzyme. Temperature 2: The active site changes shape so that the substrate cannot fit into it.

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