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Q.

A DNA molecule is 160 base pairs long. If it has 20% adenone, how many cytosine bases are present in this DNA molecule?

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a

96

b

192

c

64

d

45

answer is C.

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Detailed Solution

Total no of bases= 160×2= 320
According to Chargaff's rule A=T and G=C
So A=20% then T= 20%
Therefore G= 30% C=30%
Cytosine bases= 320×30/100= 96

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