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Which one of the following statements is incorrect about enzyme catalysis?

1. Enzymes are mostly proteinous in nature.
2. Enzyme action is specific.
3. Enzymes are denatured by ultraviolet rays and at high temperature.
4. Enzymes are least reactive at optimum temperature.

Correct answer: Enzymes are least reactive at optimum temperature.

Solution

Enzymes are most reactive at their optimum temperature, not least reactive. This makes option D incorrect.

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