Question

8. What molecules make up the outside "backbone" of this DNA molecule a.The bonded nitrogenous bases b.The phosphates and sugarsc.The phosphates and nitrogenous basesd.The sugars and nitrogenous bases

Answer 1

The molecules that make up the outside "backbone" of a DNA molecule are the phosphates and sugars (b), while inside the DNA molecule are the nitrogenous bases that form hydrogen bonds pairs between the strands of DNA, holding them together.