First slide

The DNA

Question

The length of DNA present in a haploid cell of man is

Easy

A

1.36 mm
B

1.1 mm
C

1.1m
D

2.2m

Solution

The diploid cell of human beings has 6.6 $\times 10^{9}$ bp. The length of each base pair is 0.34 $\times 10^{- 9} m$ . Hence the length of DNA of diploid cell of man is $6.6 \times 10^{9} \times 0.34 \times 10^{- 9}$ =2.2m. In a haploid cell the length of DNA is half and is therefore 1.1m.

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