搜题

补充酪氨酸可“节省”体内的

卫生招聘 (医学影像技术汇总) 2023-08-31

A.苯丙氨酸
B.组氨酸
C.蛋氨酸
D.赖氨酸
E.亮氨酸

参考答案:A

正常情况下,苯丙氨酸的主要代谢是经羟化作用,生成酪氨酸,催化此反应的是苯丙氨酸羟化酶,催化的反应不可逆。故酪氨酸不能变为苯丙氨酸。因此,补充酪氨酸,可以减少苯丙氨酸的消耗,可以节省体内的必需氨基酸苯丙氨酸。故选A。考点:苯丙氨酸和的代谢酪氨酸

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