Question

Which of the following statements about enzymes is not true?

• A. Enzymes catalyse chemical reactions by lowering the activation energy
• B. Enzymes are highly specific, both in binding chiral substrates and in catalysing their reactions
• C. Enzymes do not possess nucleophillic groups
• D. Pepsin is a proteolytic enzyme

Answer 1

The correct option is C Enzymes do not possess nucleophillic groups

a) Enzymes catalyse a chemical reaction by stabilising the transition state, thereby lowering the activation energy.
b) Enzymes are highly specific both in binding chiral substrates and in catalysing their reactions.
c) Enzymes are protein molecules which have plenty of groups like $-OH$, $-N{H}_2$ that can act as nucleophiles.
d) Pepsin is proteolytic enzyme