The chemical structure of dna and its nucleotides the dna double helix is composed of two strands of dna; each strand is a polymer of dna nucleotides. each nucleotide consists of a sugar, a phosphate group, and one of four nitrogenous bases. the structure and orientation of the two strands are important to understanding dna replication. drag the labels to their appropriate locations on the diagram below. use only the pink labels for the pink targets, and the blue labels for the blue targets. labels can be used once, more than once, or not at all.

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a 5' end

b hydrogen bond

c 3' end

d deoxyribose sugar

e nitrogenous base

f phosphate group

g 3' end

h 5' end

Explanation:

DNA nucleotides are made of 3 components:

The phosphate and sugar form a sugar phosphate backbone. The nitrogenous bases bind complementary bases in the middle of two DNA strands. This bonding occurs through hydrogen bonding.

Each strand of DNA runs anti-parallel to one another, the direction is denoted as either 5' or 3'. The 5' end represents the end that finishes with a phosphate group. The 3' end represents the end that finishes with a hydroxy group on the sugar.

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explanation: