Which of the following is the name of the vitamin A compound that is active in the visual response?
A)Opsin
B)Keratin
C)Retinal
D)Carotene
E)Optinal

Question

Quizplus · Accepted Answer

Retinal is the vitamin A compound that is active in the visual response. When retinal absorbs light, it undergoes a conformational change and triggers a series of events that ultimately result in the transmission of nerve signals to the brain, allowing us to see. Opsin is a protein found in the retina that binds to retinal to form the visual pigment rhodopsin. Keratin is a protein that forms the structural basis of hair, nails, and the outer layer of skin. Carotene is a precursor to vitamin A found in fruits and vegetables. Optinal is not a known vitamin or compound.

Which of the Following Is the Name of the Vitamin