Question

In biochemical processes, cDNA is prepared from

• A. B-DNA
• B. hnRNA
• C. Z-DNA
• D. mRNA

Answer 1

The correct option is D mRNA

Complementary DNA (cDNA) is a DNA copy of a messenger RNA (mRNA) molecule produced by reverse transcriptase. cDNA is often used to clone eukaryotic genes in prokaryotes. cDNA is also produced naturally by retroviruses (such as HIV) for integration into the host's genome.

B-DNA and Z-DNA are different forms of double-helical DNA structures. hnRNA is a precursor for mRNA in eukaryotes.

So, the correct option is 'mRNA'.