Question

In this type of inhibition the enzyme can form a complex with either the substrate (ES) or the inhibitor (EI), but not both.

A) competitive

B) non-competitive

C) mixed

D) all of the above

E) none of the above

Answer 1

A) Competitive.

Discussion and explanation :

Enzymes are inhibited by two types of inhibitors competitive and non-competitive.

In competitive inhibition, substrate and the inhibitor of the enzyme haven similar size, charge and configuration, and both compete for the single active site. Hence, only one (either substrate or inhibitor) can bind at a time to form complex with the enzyme (ES or EI).

In noncompetitive inhibition, substrate binding active site of the enzyme and inhibitor binding site are different. So, both of them can interact with enzyme at a time.

Hence, answer will be A) Competitive.