题目内容

生物结构和功能的基本单位是

A. 细胞器
B. 原生质
C. 基本颗粒
D. 胞体和胞核
E. 细胞

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组成DNA分子的碱基成分包括

ACUG
B. ATGC
C. IAGC
D. TAG和稀有碱基
E. CAG和稀有碱基

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