Genes are composed of stretches of _____, a complex molecule shaped like a twisted ladder or staircase.

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16-09-2018
Biology

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Genes are composed of stretches of _____, a complex molecule shaped like a twisted ladder or staircase.

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chisnau chisnau · Answer 1 · 2018-09-25T09:33:34+02:00

Genes are composed of stretches of DNA, a complex molecule shaped like a twisted ladder or staircase.

The shape of DNA is a double helix, which is like a twisted ladder. The sides of the ladder are made of alternating sugar and phosphate molecules. The sugar is deoxyribose. The rungs of the ladder are pairs of 4 types of nitrogen bases. A is always paired with T and G is always paired with C.