BIOMOLECULES AND ENZYMES

Detailed explanation-1: -The pentose sugar in DNA is called deoxyribose, and in RNA, the sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the 2’ carbon of the ribose and its absence on the 2’ carbon of the deoxyribose.

Detailed explanation-2: -Ribose is a monosaccharide pentose sugar present in RNA while deoxyribose is a derived monosaccharide sugar present in DNA.

Detailed explanation-3: -The pentose sugar present in DNA is ribose. Q. Polynucleotides are called nucleic acids. Each nucleotide is made up of three parts, i.e, a pentose sugar, a heterocyclic nitrogenous base and phosphoric acid.

Detailed explanation-4: -DNA consists of a pair of chains of a sugar-phosphate backbone linked by pyrimidine and purine bases to form adouble helix (Fig. 96.1). The sugar in DNA is deoxyribose. The pyrimidines are cytosine (C) and thymine (T); the purines are guanine (G) and adenine (A).

Detailed explanation-5: -DNA contains deoxyribose as the sugar component and RNA contains the sugar ribose.