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  • The fact that a purine base always paired through hydrogen bonds with a pyrimidine base leads to , in the DNA double helixOption: 1 the antiparallel

The fact that a purine base always paired through hydrogen bonds with a pyrimidine base leads to , in the DNA double helix

Option: 1

the antiparallel nature


Option: 2

the semi - conservative nature


Option: 3

uniform width throughout DNA


Option: 4

uniform length in all DNA


Answers (1)

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As we learned

Salient feature of Double helix structure -

The bases in two strands are paired through hydrogen bond (H-bond) forming base pairs (bp). Adenine forms two hydrogen bonds with thymine from opposite strand and vice versa. This generates approximately uniform distance between the two strands of the helix.

- wherein

fig 15

 

Since specific and different nitrogen bases occur on the two DNA chain, the latter are complementary. It is because of specific base pairing with a purine lying opposite to a pyrimidine. This makes the two chains 2 nm thick. A larger sized purine lies opposite to the smaller-sized pyrimidine, A opposite to T and C opposite to G. This gives the uniform width throughout DNA.

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manish painkra

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