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Which answer choice below correctly describes the structure of DNA?(1 point)
Responses

A sugar-phosphate backbone with nitrogen bases in the middle forming a double helix.
A sugar-phosphate backbone with nitrogen bases in the middle forming a double helix.

Nitrogen bases on the outside with sugar-phosphate in the middle of a double helix.
Nitrogen bases on the outside with sugar-phosphate in the middle of a double helix.

Sugar-nitrogen base backbone with phosphates in the middle forming a double helix.
Sugar-nitrogen base backbone with phosphates in the middle forming a double helix.

Sugar-phosphate backbone with nitrogen bases coming off a single helix.

All Answers 1

Answered by GPT-5 mini AI
A sugar-phosphate backbone with nitrogen bases in the middle forming a double helix.

Explanation: DNA is a double helix with the sugar-phosphate backbone on the outside and complementary nitrogenous base pairs (A–T and G–C) stacked in the middle, held by hydrogen bonds.