BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Two successive nucleotides of DNA are joined by phosphodiester linkage in which the 5’-phosphate group of one nucleotide unit is joined to the 3’-hydroxyl group of the next nucleotide. Thus, phosphate and pentose sugars of DNA are joined by phosphodiester linkage; the correct answer is B.

Detailed explanation-2: -The bond between the phosphate and hydroxyl group of sugar is an ester bond. DNA and RNA are composed of nucleotides that are linked to one another in a chain by chemical bonds, called ester bonds. Between the sugar base of one nucleotide and the phosphate group of the adjacent nucleotide.

Detailed explanation-3: -The Phosphodiester bond is a covalent bond which is generally formed between the phosphate group of 5′ carbon of one of the nucleotides and 3′ carbon of another nucleotide through the formation of ester linkage.

Detailed explanation-4: -Each strand is composed of nucleotides bonded together covalently between the phosphate group of one and the deoxyribose sugar of the next. From this backbone extend the bases. The bases of one strand bond to the bases of the second strand with hydrogen bonds.