NEET 2009 Biology question

There is no DNA in:

(1)Mature RBCsCorrect
(2)A mature spermatozoan
(3)Hair root
(4)An enucleated ovum

Answer: (1)

Solution

Mature mammalian (human) red blood cells lose their nucleus during development and so have no nuclear DNA (and no mitochondria, hence no mitochondrial DNA either). A mature spermatozoan has a haploid nucleus (and

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Question ID VK-090217