Biology, asked by manjula7282, 7 months ago

DNA is doubled stranded structure, where the strands are said to be anti - parallel. Select the statement/s that suits the above property of DNA.
(i) Length of one gyre is 34 cm.
(ii) In DNA strands the phosphate group is in 3' position and OH is in 5' position.
(iii) The free ends on both the strands have OH group.
(iv) Both strands run parallel but opposite in direction.

Option A:- Only (i)
Option B:- Only (ii)
Option C:- (iii) and (iv)
Option D:- (i), (iii) and (iv)​

Answers

Answered by guibani114982130009
0

Explanation:

DNA is double stranded, and the strands are antiparallel because they run in opposite directions. Each DNA molecule has two strands of nucleotides. Each strand has a sugar-phosphate backbone, but the orientation of the sugar molecule is opposite in the two strands. Thus the main reason of this antiparallel nature of the DNA is the presence of a phosphodiester bond that links the phosphate group to the hydroxyl group of the sugar molecule (present in alternate directions on either strand).

So, the correct option is 'phosphodiester bonds'.

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