Question:
The nitrogenous base present only in RNA is
The nitrogenous base present only in RNA is
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To remember this, think "U for RNA": RNA contains Uracil (U), while DNA contains Thymine (T).
Updated On: Apr 29, 2026
- guanine
- adenine
- cytosine
- uracil
- thymine
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The Correct Option is D
Solution and Explanation
Concept:
Nucleic acids (DNA and RNA) are composed of nitrogenous bases. There are two types: purines and pyrimidines. While most bases are shared between the two molecules, one specific base acts as a distinguishing marker.
Step 1: Compare DNA and RNA bases.
• DNA bases: Adenine (A), Guanine (G), Cytosine (C), and Thymine (T).
• RNA bases: Adenine (A), Guanine (G), Cytosine (C), and Uracil (U).
Step 2: Identify the unique base.
By comparing the lists, we see that RNA replaces Thymine with Uracil. Therefore, Uracil is the base found in RNA but not in DNA.
Step 1: Compare DNA and RNA bases.
• DNA bases: Adenine (A), Guanine (G), Cytosine (C), and Thymine (T).
• RNA bases: Adenine (A), Guanine (G), Cytosine (C), and Uracil (U).
Step 2: Identify the unique base.
By comparing the lists, we see that RNA replaces Thymine with Uracil. Therefore, Uracil is the base found in RNA but not in DNA.
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