CUET Preparation Today
| Which among the following is not a feature of double helix model of DNA ? |
Two chains have anti-parallel polarity . The pitch of the DNA is 3.4 nm . The two chains are coiled in a left-handed fashion . A purine always comes opposite to a pyrimidine . |
| The two chains are coiled in a left-handed fashion . |
| The two chains are coiled in a right-handed fashion. The pitch of the helix is 3.4 nm.It is made of two polynucleotide chains, where the backbone is constituted by sugar-phosphate.Guanine is bonded with Cytosine with three H-bonds. As a result, always a purine comes opposite to a pyrimidine . |
