Question

Select the incorrect statement from the following.

• A. Active enzyme has tertiary structure having many active sites (substrate binding sites).
• B. Enzymes are biocatalyst.
• C. Enzymes are highly specific.
• D. Enzymes are mainly protein in nature.

Answer 1

Answer: (A)

Enzymes are mainly made up of proteins that undergo complex coiling and folding to form tertiary structure, due to this coiling and folding 3 - 13 reactive amino acids comes close together forming a cavity or cleft known as an active site. The specific substrate binds to active site forming ES complex, which is an unstable transient stage forming product and the enzyme remains unchanged. Enzymes bind to a substrate and undergo a change in its quaternary structure that could open up another active site for a different type of substrate. Other enzymes have more than one of the same active site and they can bind multiples of the same substrate.