Part A Why can't humans digest cellulose? View Available Hint(s) Human teeth are not strong enough to break the wood fibers that are formed by the long chains of repeating units of monosaccharides. Cellulose is what is present in wood, and only bugs like termites can digest cellulose. Humans have a specific enzyme present in their body, amylase, that hydrolyzes beta-1,4-glycosidic bonds but not the alpha-1,4-glycosidic bonds of cellulose. Humans have a specific enzyme present in their body, amylase, that hydrolyzes alpha-1,4-glycosidic bonds but not the beta-1,4-glycosidic bonds of cellulose. Submit