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Chargaff's Rule

In a 3.2 Kbp ...

Question

In a 3.2 Kbp long piece of DNA, 820 adenine bases were found. What would be the number cytosine bases?

A

1560

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B

1480

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C

780

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D

740

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Solution

The correct option is C
780

Adenine = 820 then guanine = 820

AT = 1640 (820 + 820)

∴GC = 3200 – 1640 = 1560

Cytosine = $\frac{1560}{2}$ = 780

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