Light induces dissociation of the retinal from opsin resulting in change in the structure of

Solution:

The photoreceptors (rods and cones) in the retina contain light-sensitive proteins called photopigments. In rods, the photopigment is rhodopsin, which is a derivative of Vitamin A (retinal) and a protein (opsin). When light falls on the retina, it causes the dissociation of retinal from opsin. This dissociation leads to a conformational change in the opsin protein. This structural change in opsin initiates a series of events that lead to the generation of a nerve impulse in the photoreceptor cells.