Q.

If adenine makes 30% of the DNA molecule, what will be the percentage of thymine, guanine and cytosine in it?

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a

T : 20 ; G : 25 ; C : 25

b

T : 20 ; G : 30 ; C : 20

c

T : 20 ; G : 20 ; C : 30

d

T : 30 ; G : 20 ; C : 20

answer is D.

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Detailed Solution

Thymine – 30%, Guanine – 20%, Cytosine – 20%. Chargaff's nitrogen base pairing rule which states that amount of adenine is equal to thymine and guanine is equal to cytosine.

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