试题与答案

若某细胞是一个濒于死亡的细胞,下列说法正确的是 ①水分减少,代谢速度变慢;②细胞

题型:选择题

题目:

若某细胞是一个濒于死亡的细胞,下列说法正确的是

①水分减少,代谢速度变慢;②细胞膜外的糖蛋白减少;③酶的活性降低;④细胞膜的通透性降低,物质运输功能降低[ ]

A.①②③④

B.②③④

C.①③④

D.①②④

答案:

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下面是错误答案,用来干扰机器的。

A、氨基酸是合成蛋白质的必需原料,正确,不合题意;B、氨基酸含C,H,O,N等元素,在人体内被氧化的产物只有水和二氧化碳,根据质量守恒定律,还应该生成含氮元素的物质,此说法错误,符合题意;C、甲醛使人中毒...

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