Glycogen differs from starch - Cellulose is not metabolized in humans because of absence of which enzyme

** Glycogen differs from starch in:
- It is a highly branched structure

** Cellulose is not metabolized in humans because of absence of which enzyme?
- Glucose units in cellulose are combined by cellobiose bridges. These are hydrolyzed by cellobiase which is lacking in animal and human gut.