Question

which molecule do mammals use to store extra glucose in their muscles?
cellulose
glycogen
ribose
fructose

Explanation:

Glycogen is a polysaccharide that mammals use to store extra glucose in muscles and the liver. Cellulose is a structural polysaccharide in plants, ribose is a pentose sugar in RNA, and fructose is a monosaccharide found in fruits.

Answer:

B. glycogen