Question

Enzymes that catalyze the removal of groups from substrates by mechanism other than hydrolysis leaving double bonds are

• A. Isomerases
• B. Dehydrogenases
• C. Hydrolases
• D. Lyases

Hint:

Lyases = elimination reactions forming double bonds without hydrolysis. Remember: Dehydrogenases = redox, Hydrolases = hydrolysis, Isomerases = rearrangement.

Answer 1

The Correct Option is D

Lyases are enzymes that catalyze the cleavage of C–C, C–O, C–N bonds by means other than hydrolysis or oxidation, often forming a double bond or a new ring structure. Dehydrogenases remove hydrogen atoms; hydrolases catalyze hydrolysis; isomerases rearrange atoms within a molecule. Therefore, Lyases is correct.