Question

Choose the statements which are true among the following.

• A. A catalyst reduces the rate of a reaction
• B. A promoter increases the rate of a reaction
• C. A poison reduces the activity of a catalyst
• D. Enzymes are biocatalysts

Answer 1

Answer: (C), (D)

Enzymes are biocatalysts

Let us take this one by one.

A - is wrong. A catalyst is a substance which increases the rate of a reaction by providing an alternate pathway for the reaction which has a lower activation energy.
B - is wrong. A promoter is a substance which is used to increase the activity of a catalyst.
C - is right. A poison is used to reduce the activity of a catalyst.
D - is right. Enzymes are biocatalysts which are very specific in their action and function in a narrow temperature range.