What affect does insulin have on the body? a. it raises blood-sugar levels. b. it lowers blood-sugar levels. c. it raises glucagon levels. d. it lowers glucagon levels.

The answer is D] It lowers glucagon levels.

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.