Single Choice

The total number of nitrogenous bases in human genome is estimated to be about

A3 million
B35 million
C35 thousand
D31 billion
Correct Answer

Solution

The human genome has around 21,000 genes in its 3.3 billion base pairs haploid genome. The haploid DNA content of a cell is called as C-value. The C-value paradox is concerned with the presence of excessive amounts of DNA in eukaryotic cells and the difference of C-value between eukaryotic species having similar complexity. The presence of a large number of base pairs is explained on the basis of the large amount of structural DNA and junk DNA in chromosomes. Thus, option D is the correct answer.

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