Practice Quiz

CLEP Natural Sciences - Biological Science

Category - CLEP Natural Sciences - Biology

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Which of the following best explains why enzymes are necessary for many cellular reactions?
  1. Enzymes supply the oxygen necessary for the reactions.
  2. Enzymes change reactants from solid to liquid during the reactions.
  3. The reactions take up too much space in the cell if enzymes are missing.
  4. The reactions are too slow to meet the needs of the cell if enzymes are missing.
Explanation

Answer: D - The reactions are too slow to meet the needs of the cell if enzymes are missing.

Most commonly, enzymes accelerate biochemical reactions by lowering the amount of activation energy required.

Enzymes often lower the energy requirements of the transition state by creating an environment with a charge distribution complementary to that of the transition state.

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