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【单选题】
蛋白质一级结构与功能的关系是A.
相同氨基酸组成的蛋白质功能一定相同
B.
一级结构越相近的蛋白质，其功能类似性越大
C.
一级结构中任何氨基酸的改变，其生物学活性即丧失
D.
不同生物来源的同种蛋白质，其一级结构完全相同
E.
一级结构中任何氨基酸残基的改变，都不会影响其功能
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