NEETBotanyBiomolecules (B)
Nucleotide Pairing Bond Type A. Nucleotide-Nucleotide 1. Two hydrogen bonds B. Guanine-Cytosine 2. Three hydrogen bonds C. Sugar-Phosphate 3. Phosphodiester bond D. Adenine-Thymine 4. Glycosidic bond
Options
- AA - 4, B - 2, C - 3, D - 1
- BA - 2, B - 1, C - 4, D - 3
- CA - 3, B - 4, C - 1, D - 2
- DA - 4, B - 3, C - 2, D - 1
Correct answer
A. A - 4, B - 2, C - 3, D - 1
Step-by-step solution
Adenine-Thymine (D) pairs form two hydrogen bonds (I). Guanine-Cytosine (B) pairs form three hydrogen bonds (II), providing more stability to the DNA helix. The sugar-phosphate backbone (C) of DNA and RNA is linked by phosphodiester bonds (III). Nucleotide-nucleotide (A) interactions involve a glycosidic bond (IV) between the base and sugar.