Which of the following would be found in a cDNA library,but not a genomic library?

Question

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cDNA libraries only contain the expressed genes of a cell or tissue, which are transcribed into mRNA and then reverse-transcribed into cDNA. As a result, cDNA libraries will contain only exons, which are the expressed regions of genes that code for proteins. In contrast, a genomic library contains all of the DNA in an organism, including the non-coding regions such as introns, replication origins, and centromeres, as well as the coding regions (exons). Therefore, options A, B, C, and E would all be found in a genomic library.

Which of the Following Would Be Found in a CDNA