A 21-year-old man with premature arteriosclerosis and mental retardation is found to have homocystinuria. The following is/are true:
A. Presence of mental retardation is atypical for homocystinemia
B. The specific enzyme deficiency responsible is homocysteine methyl transferase
C. Arteriosclerotic plaques in this condition are atypically void of lipid deposition
D. Homocysteine exists in plasma in three forms: protein bound, mixed and free
Answer:C
A 21-year-old man with premature arteriosclerosis and mental retardation is found to have homocystinuria. The following is/are true:
A. Presence of mental retardation is atypical for homocystinemia B. The specific enzyme deficiency responsible is homocysteine methyl transferase C. Arteriosclerotic plaques in this condition are atypically void of lipid deposition D. Homocysteine exists in plasma in three forms: protein bound, mixed and free