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Subjects/Medicine/Medicine
Medicine
medium
stethoscope Medicine

A 50 years old female on junk food diet presented with point hemorrhages in scalp, bleeding in joints and erythemataous lesions in the skin. X-ray of knee joint was suggestive of hemahrosis. Problem lies with:

A. Hydroxylation of proline and lysine
B. Carboxylation of glutamic acid
C. Carboxylation of coagulation factors
D. Platelet aggregation defect

Explanation

Answer- A. Hydroxylation of proline and lysineVitamin C is required for post-translational modification of lysine and proline in collagen synthesisHydroxyproline is formed by post-translational hydroxylation catalyzed by prolyl hydroxylase, whose cofactors are ascorbic acid and Keto- alpha glutarate.

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