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Answer:

To conclude, nucleotides are important as they form the building blocks of nucleic acids, such as DNA and RNA. Nucleotides are made up of 3 parts. The first is a distinct nitrogenous base, which is adenine, cytosine, guanine or thymine. ... These nitrogenous bases are either purines or pyrimidines

Explanation:

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The nitrogenous bases are the most important part of the nucleotide as a

result of them being present in a DNA or RNA in a specialized pairing manner.

The DNA or RNA consists of two or more nucleotide. The nucleotides

consists of a sugar molecule ( ribose in RNA or deoxyribose in DNA) , a

phosphate group and a nitrogen bases  such as adenine (A), cytosine (C),

guanine (G), and thymine (T).

The nitrogenous bases have special pairing patterns in which the Adenine is

paired with Thymine and Cytosine is paired with Guanine. A deviation in this

pairing will result in mutation which is why they are very important.

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