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Each nucleotide in a DNA molecule is constructed of:
a) A sulphur group, a five carbon sugar molecule, and a nitrogen base.
b) A phosphate group, a six carbon sugar, and a nitrogenous base.
c) A phosphate group, a five carbon sugar, and an oxygen base.
d) A phosphate group, a five carbon sugar, and a nitrogenous base.
e) None of the above