Which enzyme's deficiency is associated with the development of homocystinuria, a condition characterized by elevated levels of homocysteine in the blood?

A Cystathionine beta-synthase ✓
B Methionine synthase
C Homocysteine methyltransferase
D Betaine-homocysteine methyltransferase

Explanation

Cystathionine beta-synthase is an enzyme that converts homocysteine to cystathionine, and its deficiency leads to homocystinuria.

Source

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