Which enzyme is involved in the metabolism of homocysteine, and what disease is associated with elevated levels of homocysteine?

A Methionine synthase and cardiovascular disease ✓
B Cystathionine beta-synthase and Alzheimer's disease
C Homocysteine methyltransferase and Parkinson's disease
D Betaine homocysteine methyltransferase and osteoporosis

Explanation

Methionine synthase is an enzyme involved in the metabolism of homocysteine, and elevated levels of homocysteine are associated with an increased risk of cardiovascular disease.

Source

NCERT Class 12 Biochemistry
Enzymes in Disease Biochemistry Amino Acid Metabolism Hard MEDICAL Confidence: high