Question

1. compare how are the four kinds of dna nucleotides different from each other?

Explanation:

DNA nucleotides consist of a sugar (deoxyribose), a phosphate group, and a nitrogenous base. The four nucleotides (adenine - A, thymine - T, cytosine - C, guanine - G) differ in their nitrogenous bases. Adenine and guanine are purines (double - ring structures), while thymine and cytosine are pyrimidines (single - ring structures). Also, adenine pairs with thymine (A - T) via two hydrogen bonds, and cytosine pairs with guanine (C - G) via three hydrogen bonds.

Answer:

The four DNA nucleotides (A, T, C, G) differ in their nitrogenous bases. Adenine and guanine are purines (double - ring), thymine and cytosine are pyrimidines (single - ring). A pairs with T (two H - bonds), C pairs with G (three H - bonds).