Question

The enzymes that catalyse endergonic synthesis, coupled with exergonic hydrolysis of ATP are

• A. Ligases
• B. Isomerases
• C. Lyases
• D. Transferases

Answer 1

Answer: (A)

Ligases

There are six major classes of enzymes, as follows:

(1) Oxidoreductases- Catalyze oxidation reduction reactions.

(2) Transferases- Catalyze the transfer of a functional group from a donor molecule to an acceptor molecule.

(3) Hydrolases- Catalyze hydrolysis reactions.

(4) Isomerases- Catalyze conversion of a molecule from one isomeric form to another.

(5) Ligases- Ligases or synthetases are enzymes that catalyse endergonic synthesis, coupled with the exergonic hydrolysis of ATP.

(6) Lyases- Catalyze certain reactions in which double bonds form or break.

So, the correct answer is option A.