Final answer:
Denaturation is a process in which a protein loses its shape and function. If urea is removed from a denatured protein, it may be able to regain its shape and resume its function.
Step-by-step explanation:
Denaturation is a process in which a protein loses its shape and is no longer able to carry out its function. If urea, which is a denaturing agent, is removed from a denatured protein, the protein can sometimes regain its functional shape and resume its function. However, denaturation can also be irreversible, leading to permanent loss of function.
For example, when an egg white is fried, the albumin protein denatures and cannot regain its original shape and function.