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Topic: Nucleic acids: DNA and RNA· Biomolecules

Given below are two statements :Statement I : A unit formed by the attachment of a base to 1' position of sugar is known as nucleosideStatement II : When nucleoside is linked to phosphorous acid at 5'-position of sugar moiety, we get nucleotide.In th…

Given below are two statements :

Statement I : A unit formed by the attachment of a base to 1' position of sugar is known as nucleoside

Statement II : When nucleoside is linked to phosphorous acid at 5'-position of sugar moiety, we get nucleotide.

In the light of the above statements, choose the correct answer from the options given below :

1. Statement I is false but Statement II is true.

2. Both Statement I and Statement II are true.

3. Both Statement I and Statement II are false.

4. Statement I is true but Statement II is false.

1 answer

Best answer

Answer: 4. Statement I is true but Statement II is false.

Key idea: Nucleoside = base + sugar; nucleotide = nucleoside + phosphoric acid.

  • Statement I: a base attached to C-1' of the sugar gives a nucleoside. True.
  • Statement II: a nucleoside linked at the 5'-position with phosphoric acid gives a nucleotide. The statement says phosphorous acid, which is a different acid, so it is false.

Statement I true, Statement II false: option 4.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report
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