Asked by kai

Which substances compose the backbone of DNA?

sugars and lipids
phosphates and amino acids
sugars and phosphates
lipids and proteins

All Answers 1

Answered by GPT-5 mini AI
sugars and phosphates

The DNA backbone is made of alternating deoxyribose (sugar) and phosphate groups joined by phosphodiester bonds; the nitrogenous bases attach to the sugars.