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【单选题】
下列关于 RNA 聚合酶和 DNA 聚合酶的叙述哪一项是正确的?
A.
RNA 聚合酶需要引物，并在延长的多核苷酸链 5’- 末端添加碱基
B.
DNA 聚合酶能同时在链两端添加核苷酸
C.
DNA 聚合酶只能以 RNA 为模板合成 DNA
D.
RNA 聚合酶和 DNA 聚合酶只能在多核苷酸链的 3’-OH 末端添加核苷酸
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