Question

weak hydrogen bonds between the nitrogenous bases hold the two strands of a dna molecule together. but hydrogen bonds can only form between certain nitrogenous bases. this is called complementary base pairing. in any dna molecule, adenine pairs only with thymine, and guanine pairs only with cytosine. complete the paragraph to describe the model. the dna model above shows nucleotides. according to the rules of complementary base pairing, e always pairs with, and guanine always pairs with

Explanation:

A DNA nucleotide consists of a deoxyribose sugar, a phosphate group, and a nitrogenous base. In the given model, there are 8 nucleotides (count the units made of deoxyribose - phosphate - base). According to complementary base - pairing rules, adenine (A) pairs with thymine (T), and guanine (G) pairs with cytosine (C).

Answer:

The DNA model above shows 8 nucleotides. According to the rules of complementary base pairing, adenine always pairs with thymine, and guanine always pairs with cytosine.