#january2020mccqe1
A 23-year-old, single, unemployed woman in her eighth month of pregnancy is seen in a volunteer-staffed obstetrics clinic. Her first child, born at home and exclusively breastfed, had prolonged diarrhea and died from an intracranial hemorrhage at 1 month of age. To help prevent a similar problem in this pregnancy, the resident gives her a free prescription for a vitamin and advises her to take one 20-mg tablet each day. He also informs her that the infant should receive an injection of this vitamin soon after birth. The vitamin prescribed is required as a coenzyme by which of the following enzymes?
(A) δ-Aminolevulinate synthase
(B) γ-Glutamyl carboxylase
(C) Homocysteine methyltransferase
(D) Prolyl hydroxylase
(E) Thrombin
A 23-year-old, single, unemployed woman in her eighth month of pregnancy is seen in a volunteer-staffed obstetrics clinic. Her first child, born at home and exclusively breastfed, had prolonged diarrhea and died from an intracranial hemorrhage at 1 month of age. To help prevent a similar problem in this pregnancy, the resident gives her a free prescription for a vitamin and advises her to take one 20-mg tablet each day. He also informs her that the infant should receive an injection of this vitamin soon after birth. The vitamin prescribed is required as a coenzyme by which of the following enzymes?
(A) δ-Aminolevulinate synthase
(B) γ-Glutamyl carboxylase
(C) Homocysteine methyltransferase
(D) Prolyl hydroxylase
(E) Thrombin
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