Question

Which of the following enzymes has the reaction of catalyzing oxidation and reducing reaction?

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

Hint:

The name of the enzyme class usually reveals its function:
Oxidoreductase = Oxidation + Reduction.
Hydrolase = Hydro (water) + Lysis (breaking).
Transferase = Transfer of groups.

Answer 1

The Correct Option is C

Step 1: Understanding the Question:
The question asks for the class of enzymes responsible for redox (oxidation-reduction) reactions in biological systems.

Step 2: Detailed Explanation:

• Enzymes are classified into six major classes based on the type of reaction they catalyze.

• Oxidoreductases (C) catalyze oxidation-reduction reactions where electrons are transferred from one molecule (the reductant/electron donor) to another (the oxidant/electron acceptor). Common examples include dehydrogenases and oxidases.

• Ligases (A) catalyze the joining of two large molecules by forming a new chemical bond, usually accompanied by ATP hydrolysis.

• Transferases (B) catalyze the transfer of a functional group (e.g., a methyl or phosphate group) from one molecule to another.

• Hydrolases (D) catalyze the cleavage of bonds by the addition of water (hydrolysis).

• Because the question specifically mentions oxidation and reduction, the name "Oxidoreductases" is the direct answer.

Step 3: Final Answer: Oxidoreductases are the enzymes that catalyze oxidation and reduction reactions.