Question

Intermediates of which of the following metabolic pathway have not been used in the synthesis of amino acids?

(a) Glycolysis

(b) Fatty acid biosynthesis

(c) Citric acid cycle

(d) Pentose phosphate pathway

The question was asked during an online exam.

My doubt is from Amino Acid Metabolism topic in division Bioenergetics and Metabolism of Life Sciences

Answer 1

Correct answer is (b) Fatty acid biosynthesis

The explanation: All amino acids are derived from the intermediates of metabolic pathways like glycolysis, citric acid cycle, and the pentose phosphate pathway. 20 amino acids have been divided into 6 families on the basis of the primary carbon source of each amino acid.