Chemistry NEET Full Syllabus Mock Test 180 Question New Syllabus Mock Test - 13 PCB Single Correct MCQ
Published on: August 13, 2026

The respiratory pathway is considered an 'amphibolic pathway'. Which of the following examples best illustrates this?

A
Because there is both synthesis and utilization of ATP.
B
The use of Acetyl-CoA in both cellular respiration and the synthesis of fatty acids.
C
The breakdown of glucose to pyruvate in glycolysis.
D
The conversion of pyruvate to lactate during fermentation.

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The correct answer is:
B

The respiratory pathway is not strictly catabolic (breakdown) but amphibolic (both breakdown and synthesis). This is because many intermediates of respiration are not only broken down for ATP but are also used as precursors in biosynthetic (anabolic) pathways. Acetyl-CoA formed in respiration is also a precursor for the synthesis of fatty acids.

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