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Question

Which is not coneietent with double helical structure of DNA ?

Options

A.A = T, C ≡ C
B.Density of DNA decreases on heating
C.A + T / C + G is not constant
D.Both (a) and (b)

Solution

Accrding to Erwin Chargaff, the base ratio A + T / G + C may vary from one species to another, but is constant for a given species. It is rarely equal to one and varies from 0.4 and 1.9.

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