Which carbohydrate is used for energy storage in the liver?
cellulose
glycerol
glycogen
starch

glycogen

This stored form of glucose is called glycogen and is primarily found in the liver and muscle. The liver contains approximately 100 grams of glycogen.

answer; /// i believe that the correct answer is (50%);

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.