Asked by nk

Which answer choice below correctly describes the structure of DNA? (1 point)
• Nitrogen bases on the outside with sugar-phosphate in the middle of a double helix.
• A sugar-phosphate backbone with nitrogen bases 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 two antiparallel sugar-phosphate backbones on the outside with complementary nitrogenous bases paired in the centre (the rungs) held by hydrogen bonds, forming a double helix.