Question

Read the following and answer from given below:

In prokaryotes, DNA is circular and present in the cytoplasm but in eukaryotes, DNA is linear and mainly confined to the nucleus. DNA or deoxyribonucleic acid is a long polymer of nucleotides. In 1953, the first correct double-helical structure of DNA was worked out by Watson and Crick. Based on the X-ray diffraction data produced by Maurice Wilkins and Rosalind Franklin. It is composed of three components, i.e., A phosphate group, a deoxyribose sugar, and a nitrogenous base. Different forms of DNA are B-DNA, Z-DNA, A-DNA, C-DNA, and D-DNA.

Name the linkage present between the nitrogen base and pentose sugar in DNA.

विकल्प

• Phosphodiester bond

• Glycosidic bond

• Hydrogen bond

• None of these

Answer 1

Glycosidic bond

Explanation:

In DNA the nitrogenous base and a pentose sugar join to form nucleoside with the help of a bond called glycosidic bond or N-glycosidic linkage.