Question

How many carbons are present in HMG co-A?

(a) 2

(b) 3

(c) 5

(d) 6

This question was addressed to me by my school principal while I was bunking the class.

I'd like to ask this question from Biosynthesis of Cholesterol, Steroids and Isoprenoids topic in section Lipid Biosynthesis, Biosynthesis of Amino Acids, Nucleotides and Related Molecules of Biochemistry

Answer 1

The correct answer is (d) 6

Easy explanation: Two molecules of acetyl co-A condense to form acetoacetyl co-A, which condenses with the third molecule of acetyl co-A to yield a six-carbon compound HMG co-A.