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Gaokao Biology Practice Question

已知(1)酶、(2)抗体、(3)激素、(4)糖原、(5)脂肪、(6)核酸都是人体内有重要作用的物质。下列说法正确的 是

  1. A.(1)(2)(3)都是由氨基酸通过肽键连接而成的
  2. B.(3)(4)(5)都是生物大分子, 都以碳链为骨架
  3. C.(1)(2)(6)都是由含氮的单体连接成的多聚体
  4. D.(4)(5)(6)都是人体细胞内的主要能源物质

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