Question:
The moiety present at the 5' end of ribose sugar in a polynucleotide is
The moiety present at the 5' end of ribose sugar in a polynucleotide is
Updated On: Nov 21, 2023
- OH
- CH$_2$
- Phosphate
- Adenine
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The Correct Option is C
Solution and Explanation
A polynucleotide has a free phosphate moiety at 5'-end of ribose sugar, which is referred to as 5'-end of polynucleotide chain, and at the other end of the polymer the ribose has a free 3'-OH group which is referred to as 3'-end of the polynucleotide chain.
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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.