下列是DNA的一段碱基序列。AGCTTGCAACGTTGCATTAG
（a）写出DNA聚合酶以上面的DNA片段为模板，复制出的DNA碱基序列。
（b）以（a）中复制出的DNA碱基序列为模板，在RNA聚合酶催化下，转录出的mRNA的碱基序列。
参考答案：
（a）5ˊ-CTAATGCAACGTTGCAAGCT-3ˊ
（b）5ˊ-AGCUUGCAACGUUGCAUUAG-3ˊ
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