Question

Which of the following base is not found in DNA?

• A. Adenine
• B. Guanine
• C. Cytosine
• D. Uracil

Answer 1

The correct option is D

Uracil

The correct anwer is option D.

Explanation of the correct option:

1. DNA stands for Deoxyribonucleic acid. DNA contains genetic information and instructions for the synthesis of protein.
2. DNA is made up of a polymer of a polynucleotide chain.
3. Uracil is absent in DNA. It is found in RNA.
4. In place of Uracil, Thymine is found in DNA.

Explanation of the incorrect option:

Option A

Adenine is found in both RNA and DNA.

Option B

Guanine is found in both RNA and DNA.

Option C

Cytosine is found in both RNA and DNA.

Final answer: Uracil is not found in DNA.