题目内容

The storage and transmission of biological information are the only known functions of DNA.

A. 播送
B. 传递
C. 传输
D. 变速器

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Nucleotides have three characteristic components: a nitrogenous base, a pentose, and a phosphate.

A. 核苷酸
B. 含氮碱基
C. 戊糖
D. 磷酸基

The molecular without the phosphate group is called a nucleoside.

A. 磷酸团
B. 磷酸盐组
C. 皮膜化成
D. 磷酸基

metabolism _____________。

cofactor _____________。