G

Phosphate Adenine (A) group

Hydrogen bonds

Nitrogenous base

Sugar

(deoxyribose)

Nucleotide

Nitrogenous base

Sugar

(deoxyribose)

Nucleotide

Nucleus'

Chromosome

I ft

Cell figure 10-6

The DNA double helix is made up of two strands of nucleotides that twist into a shape that resembles a spiral staircase.

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