Within the range below its optimum, raising the temperature by 10 °C approximately doubles the rate of an enzyme-catalysed reaction. This is because

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molecules move faster and collide more often with sufficient energy.. Higher temperature increases the kinetic energy of enzyme and substrate molecules, so successful collisions occur more frequently; the temperature coefficient $Q_{10}$ is about 2. Above the optimum, denaturation begins and the rate falls sharply.

Answer

A) the active site becomes larger.

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B) molecules move faster and collide more often with sufficient energy.

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C) the enzyme becomes denatured.

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D) more enzyme molecules are produced.

Within the range below its optimum, raising the temperature by 10 °C approximately doubles the rate of an enzyme-catalysed reaction. This is because

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