Chitin is all of the following except it is found in the plant cell wall. So, the correct option is D.
It is the outermost layer of a cell that can be tough, flexible, and sometimes rigid. Its function is to provide structural support and protection to the complete cell.
The Cell-wall of fungi is made up of chitin. It is composed of N-acetylglucosamine subunits. It is also composed of linear fibrils like cellulose. Mostly, found in insect and crustacean shells.
Therefore, Chitin is all of the following except it is found in the plant cell wall.
To learn more about Chitin, refer to the link:
https://brainly.com/question/10878050
