某蛋白质由3条多肽链、N个氨基酸组成,下列关于该蛋白质说法正确

某蛋白质由3条多肽链、N个氨基酸组成,下列关于该蛋白质说法正确的是(  )

A.形成该蛋白质时产生了N个水分子

B.该蛋白质中至少含有N个肽键

C.该蛋白质中至少含有3个游离的羧基

D.合成该蛋白质至少需要20种氨基酸

答案

【解析】 形成该蛋白质时,产生水分子数为N3,含有N3个肽键。至少含有的游离的羧基数=肽链条数=3

【答案】 C

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