In a DNA strand successive nucleotides are linked by a hydro

In a DNA strand, successive nucleotides are linked by:

a. hydrogen bonds

b. base stacking

c. 5\'-3\' phosphodiester bonds

d. 5\'-2\' phosphodiester bonds

e. peptide bonds

Solution

c. 5\'-3\' phosphodiester bonds

Explanation: Nucleotide is constituted of a molecule of sugar, a molecule of phosphate and one of the four bases (adenine, guanine, thiamine, cytosine). DNA has a hydrophilic backbone. The 5\'-hydroxyl group of one nucleotide unit is connected to the 3\'-hydroxyl group of the next nucleotide through phosphodiester linkage.