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NEETZoologyMolecular Basis of Inheritance

Select the incorrect statement for the given figure.

Options

  1. AAdenine forms two hydrogen bonds with Thymine from opposite strands and vice-versa.
  2. BGuanine is bonded with Cytosine with three H-bonds.
  3. CAlways a purine comes opposite to a pyrimidine. This generates non-uniform distance between the two strands of
  4. DNone of the above

Correct answer

C. Always a purine comes opposite to a pyrimidine. This generates non-uniform distance between the two strands of

Step-by-step solution

The salient features of the Double-helix structure of DNA are as follows: (i) It is made of two polynucleotide chains, where the backbone is constituted by sugar-phosphate, and the bases project inside. (ii) The two chains have antiparallel polarity. It means, if one chain has the polarity 5' → 3', the other has 3' → 5'. (iii) The bases in two strands are paired through hydrogen bonds (H-bonds) forming base pairs (bp). Adenine forms two hydrogen bonds with Thymine from opposite strands and vice-versa. Similarly, Gu

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