If there are 81 million bases in RNA of human cell, then calculate the total number of introns present in cDNA

27 millions

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Zero

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Equal to ribonucleotides

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Half the number of ribonucleotides

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Solution

The correct option is A Zero
The human cell is eukaryotic. Eukaryotic genes commonly contain introns(non-coding sequences). These are removed after mRNA synthesis so cDNA contain no introns. This means a cDNA copy of a gene can be isolated as a single, intron-free fragment. So, the total number of introns present in cDNA is zero.
So, the correct answer is 'Zero'.

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