How do the cdnas vary from the original genes, Biology

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How do the cDNAs vary from the original genes?

A. The inserted cDNA copies lack enhancers, promoters and introns.

B. The genomic structures of the original gene and the inserted cDNA copy are identical.

C. The inserted cDNA copies lack enhancers and promoters but retain intronic sequences.

D. The inserted cDNA copies lack transcriptional and translational start sites.

 


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