Neural Control and Coordination Question 54
54. The purplish red pigment rhodopsin contained in the rods type of photoreceptor cells of the human eye, is a derivative of:
[2011]
(a) vitamin $B_1$
(b) vitamin $C$
(c) vitamin $D$
(d) vitamin $A$
Show Answer
Answer : d
Hints & Solutions
(d) Rhodopsin contained in the rod type of photoreceptor cells of human eye is a derivative of vitamin A. Rhodopsin is a biological pigment found in the rods of the retina and is a G-proteincoupled receptor (GPCR). It belongs to opsins. Rhodopsin is extremely sensitive to light, and thus enables vision in low-light conditions. When rhodopsin is exposed to light, it immediately photobleaches.
