Question:

The component present in both nucleotides and nucleosides is

Updated On: Jul 7, 2022
  • sugar
  • phosphate
  • nitrogenous base
  • both (a) and (c)
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The Correct Option is D

Solution and Explanation

Nucleoside is a compound formed by the union of a nitrogen base with a pentose sugar. It is a component of nucleotide. Each nucleotide is composed of three units; a nitrogen base, a pentose sugar and a phosphate group.
The nucleoside combines with a phosphate group at $5'$ position by an ester bond to form a nucleotide or nucleoside monophosphate.
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Notes on Nucleic Acids

Concepts Used:

Nucleic acids

Nucleic acids are explained as long-chain polymeric molecules, where the monomer (the repeating unit) is referred to as the nucleotides. Thus many times nucleic acids are referred to as polynucleotides. The two main kinds of nucleic acids are-

Deoxyribonucleic Acid (DNA)

Chemically, DNA is a composition of a pentose sugar, phosphoric acid, and some cyclic bases that have nitrogen in them. DNA has β-D-2-deoxyribose in it, in the form of the sugar moiety.

Ribonucleic Acid (RNA)

The RNA molecule is a composition of phosphoric acid, a pentose sugar, and some cyclic bases containing nitrogen. The sugar moiety inside RNA molecules is β-D-ribose.