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There is no DNA in
A
Hair root
B
An enucleated ovum
C
Mature RBCs
D
A mature spermatozoan
Detailed Solution
Mature mammalian RBCs lose their nucleus during development, so they have no nuclear DNA; they also lack mitochondria, so they have no mitochondrial DNA either.
Hair root cells are living, nucleated cells and contain DNA.
An enucleated ovum has lost its nucleus but still has mitochondria in its cytoplasm, which contain mitochondrial DNA.
A mature spermatozoan has a haploid nucleus in its head and mitochondria in its middle piece.
Hence there is no DNA in mature RBCs.
Hair root cells are living, nucleated cells and contain DNA.
An enucleated ovum has lost its nucleus but still has mitochondria in its cytoplasm, which contain mitochondrial DNA.
A mature spermatozoan has a haploid nucleus in its head and mitochondria in its middle piece.
Hence there is no DNA in mature RBCs.