To answer this question we need to remember quickly the structure of DNA. Each nucleotide of DNA is composed of deoxyribose (pentose), a phosphate group, and a nitrogenated base that can be Adenine, Guanine, Cytokine, and Thymine, in the strand each nucleotide is joined with the next by the phosphate group and carbon in the next pentose, each base is paired with its complementary interacting through hydrogen bonds.
The structures are as follows
a.-Adenine, Puric nitrogenated base
b.-Cytokine, Primidic nitrogenated base
c.-Adenine, Puric nitrogenated base
d.-Thymine, Pirimidic nitrogenated base
e.-Guanine, Puric nitrogenated base
f.- Cytokine, Primidic nitrogenated base
g.-Nucleotide
h.-Hydrogen bond
i.-Pentose phosphate