Question

Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A): The citric acid cycle is amphibolic in nature rather than only catabolic.
Reason (R): Several biosynthetic pathways utilize citric acid cycle intermediates as precursors for the synthesis of important products.
In light of the above statements, choose the correct answer from the options given below:

• A. Both (A) and (R) are true and (R) is the correct explanation of (A).
• B. Both (A) and (R) are true but (R) is NOT the correct explanation of (A).
• C. (A) is true but (R) is false.
• D. (A) is false but (R) is true.

Hint:

To easily identify if a metabolic pathway is amphibolic, evaluate if its intermediates serve as key biosynthetic starting points.
The siphoning of Krebs cycle intermediates (like succinyl-CoA for heme and oxaloacetate for aspartate) is a frequent topic in biochemistry exams.

Answer 1

The Correct Option is A