试题与答案

γ-氨基丁酸合成的原料是() A.甘氨酸 B.色氨酸 C.酩氨酸 D.谷氨酸

题型:单项选择题 B型题

题目:

γ-氨基丁酸合成的原料是()

A.甘氨酸

B.色氨酸

C.酩氨酸

D.谷氨酸

答案:

参考答案:D

解析:

①苯丙氨酸和酪氨酸代谢常考。右下方框内为儿茶酚胺。从下图可知,合成去甲肾上腺素的原料是酪氨酸或苯丙氨酸。

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