Question

2. What monomer is shown above? What macromolecule is it a monomer for?

Answer 1

Nucleotides are the building blocks of nucleic acids. In DNA, there are four types of nucleotides each containing one of four nitrogenous bases: guanine (G), cytosine (C), adenine (A), thymine (T).

• The monomer exhibited in the figure is a NUCLEOTIDE, i.e., a purine (Adenine) nucleotide.

• A nucleotide is a molecule composed of a nitrogenous base, a pentose sugar (deoxyribose in DNA) and a phosphate group.

• Purine bases consist of a double‐ring structure having four nitrogen (N) atoms and five carbons (C) atoms.

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