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What do Nucleotides in DNA Consist of?

dna nucleotides
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What do Nucleotides in DNA Consist of?

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10

Nucleotides in DNA consists of three molecules – a nitrogenous base, a pentose sugar and a phosphate group. Nitrogenous Base Nucleotide has a nitrogenous base which is hetrocyclic in structure. Purines and pyrimidines are the two types of bases found in the nucleotides which are further classified into adenine (A) and guanine (G) as purines and thymine (T) and cytosine (C) as pyrimidines. The pair or bond always forms between A to T and G to C or reverse. The bond between purines and pyrimidines is always a hydrogen bond. Pentose Sugar In nucleotide, 5 carbon sugar molecules are present with 3 oxygen. This makes it a pentose sugar. In DNA, it is deoxyribose sugar nucleotide which further becomes deoxyribonucleic acid. Combination of nitrogenous base and pentose sugar is known as nucleosides. But nucleosides are different from nucleotides as they lack phosphate group. Phosphate Group A phosphate group in a nucleotide can be a monophosphate , diphosphate or a triphosphate. Structure of a

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