First slide

Enzymes

Question

Which of the following is an incorrect statement with respect to Enzymes?

Easy

A

Enzymes increase the energy of activation of a biochemical reaction
B

Enzymes are sensitive to pH
C

Enzymes are thermolabile
D

$K_{M}$ value indicates the affinity of enzyme towards the substrate.

Solution

Enzymes decrease the energy of activation of a biochemical reaction. So that the reactions in a living cell can occur at body temperature. An enzyme uncatalyzed reaction requires more activation energy. Enzymes are sensitive to temperature and pH. Lesser is the $K_{M}$ value higher is the affinity of enzyme towards the substrate. It differs from enzyme to enzyme and substrate to substrate.

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