The Question is from neet-botany molecular-basis-of-inheritance , and it was created by the author NISHANTH

Question

Which nitrogenous base is found in DNA but NOT in RNA?

NISHANTH · Accepted Answer

## CORE INFORMATION
✓ **Answer**: D
## CONCEPT FRAMEWORK
	**Primary Concept**: Structure of nucleic acids
	**Related Topics**: DNA vs. RNA, Nitrogenous bases, Molecular biology
	**Prerequisites**: Basic understanding of nucleotides and their components
## SOLUTION PATHWAY
**Given Information**:
		- DNA contains the nitrogenous bases Adenine, Thymine, Cytosine, and Guanine.
		- RNA contains the nitrogenous bases Adenine, Uracil, Cytosine, and Guanine.
**Method & Steps**:
	1.	Identify the nitrogenous bases present in DNA.
		Reasoning: DNA's composition defines its structure and function.
		Formula/Rule: DNA bases = {A, T, C, G}
	2.	Identify the nitrogenous bases present in RNA.
		Working: RNA substitutes Uracil for Thymine.
		Key Point: RNA bases = {A, U, C, G}
	3.	Compare the bases from both nucleic acids.
		Result: Thymine is unique to DNA.
		Verification: Confirm that Thymine does not exist in RNA's base set.
 ## OPTION ANALYSIS
[A] :x: Adenine is found in both DNA and RNA.
[B] :x: Guanine is found in both DNA and RNA.
[C] :x: Cytosine is found in both DNA and RNA.
[D] ✓: Thymine is present in DNA but not in RNA.
 ## LEARNING AIDS
	**Common Mistakes**:
		1. Confusing Thymine with Uracil: Remember that Thymine is exclusive to DNA, while Uracil replaces it in RNA.
		2. Overlooking the base pair rules: Ensure clarity on which bases pair together in DNA and RNA.
	**Quick Tips**:
		1. Use the acronym TAGC for DNA and AUGC for RNA to remember the nitrogenous bases.
		2. Remember that RNA has Uracil instead of Thymine, which is a key distinguishing feature.

NISHANTH · Answer

Adenine

NISHANTH · Answer

Guanine

NISHANTH · Answer

Cytosine

NISHANTH · Answer

The correct Option is "Thymine"

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