Question

Draw the structures of the nucleosides formed from each of the following components: (a) ribose + uracil; (b) 2-deoxyribose + guanine.

Short answer

Answer

(a.)Ribose+uracil

2-deoxyribose+guanine(b.)

Step-by-step solution

Ribose and deoxyribose

Ribonucleotides are the building blocks of the polymer ribonucleic acid, or RNA, the messenger molecules that convert genetic information into proteins.

Deoxyribonucleotides are the building blocks of the polymer deoxyribonucleic acid, or DNA, the molecules responsible for storing all genetic information.

N-glycosides

Each nucleoside has sugar and a base, joined together by a $\mathrm{\beta }$-N-glycosidic linkage.

The structure of uracil is:

Structure of uracil

The structure of guanine is:

Structure of guanine

Given Nucleosides structure

Ribose is a pyranose ring. Uracil is a nucleobase that helps with cell functioning.

The structures of the required N-glycosides are as shown:

Nucleoside formed from ribose+uracil

Nucleoside formed from 2-deoxyribose+guanine