Question

A 45-year-old male is concerned about his risk of

a heart attack since his brother just had a heart
attack at the age of 46. His physician orders an
HbA1C, lipid panel, and homocysteine level.
A reduction in the metabolism of which
one of the following amino acids can lead to
elevated homocysteine levels in the blood?
(A) Alanine
(B) Methionine
(C) Phenylalanine
(D) Glutamate
(E) Cysteine

Answer 1

A reduction in the metabolism of the amino acid methionine can lead to elevated homocysteine levels in the blood.

Step-by-step explanation:

Elevated homocysteine levels in the blood can result from a reduction in the metabolism of methionine, one of the essential amino acids. Genetic deficiencies or inadequate supply of cofactors involved in homocysteine metabolism can lead to the accumulation of homocysteine and its metabolites, which are associated with cardiovascular and neurodegenerative diseases. Homocysteine levels can be measured using a homocysteine level blood test.