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Question
All RNA except .......... is made from DNA.
All RNA except .......... is made from DNA.
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Solution
The correct option is A cDNA
cDNA or complementary DNA is the DNA synthesized from a single-stranded RNA template in a reaction catalysed by reverse transcriptase enzyme. This cDNA is naturally produced by retroviruses where RNA acts as the genetic material. It is also used to clone eukaryotic genes in prokaryotes.Remaining tRNA, mRNA and rRNA are synthesised from DNA through the process of transcription using RNA polymerase enzyme.So, the correct option is 'cDNA'.
cDNA or complementary DNA is the DNA synthesized from a single-stranded RNA template in a reaction catalysed by reverse transcriptase enzyme. This cDNA is naturally produced by retroviruses where RNA acts as the genetic material. It is also used to clone eukaryotic genes in prokaryotes.
Remaining tRNA, mRNA and rRNA are synthesised from DNA through the process of transcription using RNA polymerase enzyme.
So, the correct option is 'cDNA'.
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