Question

Choose the correct answer from the alternatives given :
In some viruses, DNA is synthesised by using RNA as template. Such a DNA is called

• A. A-DNA
• B. B-DNA
• C. cDNA
• D. rDNA

Answer 1

Answer: (C)

cDNA

Complimentary DNA( cDNA) is DNA synthesized from a single-stranded RNA template in a reaction catalyzed by the enzyme reverse transcriptase. RNA of viruses first synthesizes complementary DNA (cDNA) through reverse transcription. DNA then transfers information to RNA which takes part in the translation of coded information to form a polypeptide.

So, the correct answer is 'cDNA'.