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Assertion (A): The basic structural unit of DNA is nucleotide. Reason (R): DNA is composed of repeating nucleosome which are made up of three components - pentose sugar, phosphate group and

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Question

Assertion (A): The basic structural unit of DNA is nucleotide.

Reason (R): DNA is composed of repeating nucleosome which are made up of three components - pentose sugar, phosphate group and nitrogenous bases.

Options

  • A is True and R is False.

  • A is False and R is True.

  • Both A and R are True.

  • Both A and R are False.

MCQ
Assertion and Reasoning
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Solution

A is True and R is False.

Explanation:

A is correct. Nucleotides are the essential components of DNA. Each nucleotide in DNA is made up of a pentose sugar, a phosphate group, and a nitrogenous base, which repeats.

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Chapter 2: Structure of chromosome, cell cycle and cell division - Review Questions [Page 21]

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Selina Concise Biology [English] Class 10 ICSE
Chapter 2 Structure of chromosome, cell cycle and cell division
Review Questions | Q A. 20. | Page 21
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