Which of the following amino acids is purely ketogenic i. e. cannot be converted to glucose?

a. Tyrosine

b. Leucine

c. Isoleucine

d. Glutamate

Answer: Leucine

Explanation:

The amino acid that cannot be converted back into glucose is known as ketogenic amino acids.

There are basically two types of amino acid one is glucogenic and other is ketogenic.

The ketogenic amino acids are brokendown directly into acetyl CoA, which is known to be the precursor of ketone bodies and myelin formation during the early development.

Hence, the correct answer is option B