Which of these is an example of structural protein in plants?

A.) Chitin

B.) Lignin

C.) Keratin

The correct answer is B. Lignin

It is a structural protein that provides support tissues for vascular plants and some algae.

Lignin is a structural protein that is found in plants. Lignin is usually part of the cellulosic plants that must be set apart first from the inherent sugars of the plants in order to optimize the utilization of the plants for the production of biofuels, substrates and other products