Question

Read the statements regarding structure of polynucleotide chain and choose the correct option. 1. $\quad$A nitrogenous base is linked to the pentose sugar through a$\quad$ $\quad$ $\quad$ $\quad$phospho-diester linkage. 2. $\quad$Two nucleotides are linked through 3'-5' N-glycosidic linkage to $\quad$ $\quad$form a dinucleotide. 3. $\quad$The polynucleotide backbone is formed by sugar and phosphate. 4.$\quad$ A phosphate group is linked to 5'-OH of a nucleoside through a N-$\quad$ $\quad$glycosidic linkage to form a nucleotide.

• A. 4 alone is correct
• B. 3 alone is correct
• C. 1, 3 and 4 alone are correct
• D. 1 and 4 alone are correct

Answer 1

Answer: (B)

3 alone is correct

Answer 2

Answer (b) 3 alone is correct