Because humans eat more than they really should
Answer is A.. hope this helps:)
Cellulase is an enzyme. Like other enzymes cellulase is mostly made of proteins. Cellulase is used to catalyze (digest) celluloysis, which is a polysaccharide in plants' cell wall.
The two monomers present in one molecule of disaccharide sucrose is composed of the monomers glucose and fructose.