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Question

Which of these statements about eukaryotic DNA is incorrect?

I. It contains the complementary base pair A-U.

II. The two strands are antiparallel ( 5' - 3') with 10 base pairs in each helix of 3.4 Å.

III. Number of Purines > Number of Pyrimidines.


A
I and III
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B
II and III
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C
I and III
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D
None of the above
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Solution

The correct option is C I and III

Regarding the statements considered in the relation with DNA statements I and III are incorrect because :

I. It contains the complementary base pair A-T but not (A-U).

III. Number of Purines = Number of Pyrimidines (Chargaff's rule).


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