Q.

Statement-I: The diameter of DNA helix is 20 A0.


Statement-II: Purines of one strand are linked  with pyramidines of other strand and vice versa.


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a

Statement II is true, I is false

b

State I is true, II is false

c

Both statements I and II are true

d

Both statements I and II are false 

answer is A.

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Detailed Solution

The width or diameter of DNA is 20 A0. Purine Adenine is paired with pyrimidine thymine of opposite strand and similarly purine guanine pairs with pyrimidine cytosine of opposite strand.
 
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