It's called cDNA or complimentary DNA to indicate that it's a copy, a complimentary copy of the messenger RNA.

它叫cDNA或者互补DNA,意味着它是一个拷贝,一个信使RNA反转录得出的DNA拷贝

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Transcription just means making a single stranded RNA copy of a sequence of base pairs in a DNA.

转录的过程就是从一段DNA碱基序列中,复制出一段单链RNA

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Before, we talked about how do you know what messenger RNA to make, how do you know what RNA to copy from a DNA template?

在之前的课上,我们说到如何判断mRNA的具体序列,如何判断RNA从DNA模板复制了什么

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Certain segments of DNA are being converted into RNA, and whereas in replication, you have to copy the whole genome, the whole - all of the chromosomes, all of the DNA contained in the chromosomes of the cell in order to completely replicate it; transcription only works on particular sequences of DNA.

特定的DNA序列被转录为RNA,在复制的过程中,整条染色体都被复制,包括其中的全部DNA序列,都被分毫不差地复制下来,以保证复制的完整性,而转录过程只发生在特定的DNA序列上

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