Question

question 20 (2.5 points)
humans do not contain the enzymes to break down

cellulose

fructose

glycogen

starch

sucrose

Explanation:

Cellulose is a polysaccharide made of glucose units linked by β - 1,4 - glycosidic bonds. Humans lack the enzyme cellulase which is required to break these bonds. Fructose is a monosaccharide that can be metabolized. Glycogen is broken down by glycogen phosphorylase in humans. Starch is digested by amylase (α - amylase in saliva and pancreatic amylase). Sucrose is broken down by sucrase into glucose and fructose.

Answer:

cellulose