Question

Which of the following enzyme is not used in the synthesis of triacylglycerol?

(a) Glycerol-3-phosphate acyltransferase

(b) Acylglycerophophate acyltransferase

(c) Phosphatidic acid phosphohydrolase

(d) Glycogen phosphorylase

This question was posed to me by my college director while I was bunking the class.

This intriguing question originated from Lipid Metabolism in portion Bioenergetics and Metabolism of Life Sciences

Answer 1

Right option is (d) Glycogen phosphorylase

The best I can explain: Triacylglycerol biosynthetic pathway involves the formation of triacylglycerol by glycerol-3-phosphate. It involves four steps catalyzed by all the above enzymes except glycogen phosphorylase. The fourth enzyme is Diacylglycerol acyltransferase which converts diacylglycerol to triacylglycerol.