Question

At how many places, Co-A is used in aerobic respiration after glycolysis?

• A. Three
• B. Four
• C. One
• D. Two

Hint:

Co-A is used in two places in aerobic respiration: in the formation of acetyl-CoA from pyruvate and in the citric acid cycle.

Answer 1

The Correct Option is D

Step 1: Understanding the role of Co-A.
Coenzyme A (Co-A) plays a crucial role in aerobic respiration. After glycolysis, it is used in the formation of acetyl-CoA and also in the citric acid cycle (Krebs cycle).
Step 2: Analyzing the options.
(A) Three: Incorrect. Co-A is involved in two key processes, not three.
(B) Four: Incorrect. Co-A is used in two key places during aerobic respiration.
(C) One: Incorrect. Co-A is involved in multiple steps, not just one.
(D) Two: Correct. Co-A is used in two major steps: the formation of acetyl-CoA and in the citric acid cycle.
Step 3: Conclusion.
The correct answer is (D) Two, as Co-A is used in two key processes after glycolysis.