Biology 5090 · O Level · Effects of temperature and pH

Effects of temperature and pH — practice question

The graph indicates the concentration of maltose formed as amylase breaks down starch at different pH values. What accounts for the pattern of the graph between point X and point Y?

  • AThe enzyme is completely denatured and does not work at all.
  • BThe enzyme molecules have less kinetic energy.
  • CThe shape of the enzyme active site is changing and does not fit the substrate so well.
  • DThe substrate molecules have more kinetic energy.

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