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arsen [322]
3 years ago
6

Because it has no introns, researchers prefer to use ____ when working with human genes.

Biology
1 answer:
pochemuha3 years ago
5 0
The correct answer is d: cDNA.  
<span>cDNA or complementary DNA is DNA synthesized usually from messenger RNA (mRNA) by the enzyme reverse transcriptase. Because this molecule is from mRNA it contains only exons. cDNA is also produced naturally by retroviruses, for example, HIV virus.</span>
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