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Question:
Which base is not found in DNA?
Which base is not found in DNA?
Updated On: Apr 30, 2024
- Uracil
- Adenine
- Guanine
- Cytosine
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The Correct Option is A
Solution and Explanation
The correct answer is option (A): Uracil
The bases present in DNA are adenine, Guanine, Cytosine and Thymine. Of these adenine and guanine are double-ringed structures called purine and cytosine and thymine are pyrimidine. Uracil on the other hand is present in RNA in the place of thymine and belongs to pyrimidine. Adenime and Thymine forms two hydrogen bond and guanine and Cytosine form three hydrogen bond.
The bases present in DNA are adenine, Guanine, Cytosine and Thymine. Of these adenine and guanine are double-ringed structures called purine and cytosine and thymine are pyrimidine. Uracil on the other hand is present in RNA in the place of thymine and belongs to pyrimidine. Adenime and Thymine forms two hydrogen bond and guanine and Cytosine form three hydrogen bond.
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Concepts Used:
Nucleic acids
Nucleic acids are explained as long-chain polymeric molecules, where the monomer (the repeating unit) is referred to as the nucleotides. Thus many times nucleic acids are referred to as polynucleotides. The two main kinds of nucleic acids are-
Deoxyribonucleic Acid (DNA)
Chemically, DNA is a composition of a pentose sugar, phosphoric acid, and some cyclic bases that have nitrogen in them. DNA has β-D-2-deoxyribose in it, in the form of the sugar moiety.
Ribonucleic Acid (RNA)
The RNA molecule is a composition of phosphoric acid, a pentose sugar, and some cyclic bases containing nitrogen. The sugar moiety inside RNA molecules is β-D-ribose.
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