Final answer:
In the context of a DNA molecule, each nucleotide is made up of just one phosphate group, a pentose sugar (deoxyribose), and a nitrogenous base. Therefore, the presence of c)'Three phosphate groups' is not part of a DNA nucleotide.
Step-by-step explanation:
Nucleotides, which are the building blocks of DNA, are composed of three components:
- A nitrogenous base (adenine, cytosine, guanine, thymine, or uracil)
- A pentose sugar (deoxyribose in DNA)
- A phosphate group
While nucleotides can have varying numbers of phosphate groups when they are part of energy compounds like ATP (adenosine triphosphate), in the context of a DNA molecule, each nucleotide only has one phosphate group. Thus, the presence of three phosphate groups is not characteristic of a DNA nucleotide.