NEET2020ZoologyMolecular Basis of InheritanceActual
Which of the following statements is correct?
Options
- AAdenine pairs with thymine through one H-bond
- BAdenine pairs with thymine through three H-bonds
- CAdenine does not pair with thymine
- DAdenine pairs with thymine through two H-bonds
Correct answer
D. Adenine pairs with thymine through two H-bonds
Step-by-step solution
Erwin Chargaff’s rules: Chargaff’s along with his colleagues, performed base composition studies and put forward certain generalizations for double-stranded DNA, called Chargaff’s rule (Not applicable for single-stranded DNA). i) Purines and pyrimidines occur in equal amounts. ii) Purines found in DNA are adenine and guanine. Pyrimidines of DNA are thymine and cytosine. A + G = T + C iii) A + G T + C   =   1 this value is constant for all species. iv) Base ratio A + T G + C is specific f