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Cellular and Molecular Biology

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DNA Nucleotide Structure

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A DNA strand is a polymer of individual subunits called nucleotides. Choose the terms that describe the structure of a DNA nucleotide.

DNA nucleotides contain the sugar

, a phosphate group, and a nitrogenous base of either adenine, cytosine, guanine, or

.

The phosphate group is attached to the

carbon of the sugar and the base is attached to the

carbon.

In a DNA polymerization reaction, a new nucleotide will be attached to the

carbon of the last nucleotide in the chain.