Biology 9700 · AS & A Level · Mode of action of enzymes

Mode of action of enzymes — practice question

The graph illustrates the influence of an enzyme on a reaction. Which row correctly identifies X, Y and Z?

  • AX: catalysed reaction, Y: uncatalysed reaction, Z: energy lost by product
  • BX: catalysed reaction, Y: uncatalysed reaction, Z: overall energy lost during reaction
  • CX: uncatalysed reaction, Y: catalysed reaction, Z: energy gained by product
  • DX: uncatalysed reaction, Y: catalysed reaction, Z: overall energy released during reaction

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