Question

_________ catalyze covalent bonding between two molecules to form a large molecule.

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

Answer 1

The correct option is D

Ligases

The correct option is D

Explanation of the correct option:

1. Ligases are enzymes that join two compounds by the formation of covalent bonds.
2. A good example is DNA ligase which joins breaks of DNA fragments by forming phosphodiester bonds.

Explanation of the incorrect option:

Option A:

1. Hydrolases are enzymes that catalyze bond cleavage by reaction with water.
2. Some examples of hydrolases are- lipase, and phosphatase.

Option B:

1. Transferase enzyme catalyzes the transfer of methyl, carbonyl group, and an acyl group from a donor to an acceptor compound.
2. Example-phosphorylase ,transaminase.

Option C:

1. Isomerase enzyme catalyzes reactions by structural rearrangement of the molecule.
2. Examples- triose phosphate isomerase,

Final answer: Ligases catalyze covalent bonding between two molecules to form a large molecule.