Which of the Following Carbohydrates Makes Up Crustacean Shells

Question

Which of the following carbohydrates makes up crustacean shells?
A) cellulose
B) chitin
C) glucose
D) glycogen

Accepted Answer

Crustacean shells are made of chitin, a structural carbohydrate that is also found in the exoskeletons of insects and the beaks of cephalopods. Cellulose is found in plant cell walls, glucose is a simple sugar that is a component of many carbohydrates, and glycogen is a storage form of glucose that is used by animals for energy.