Neural Control and Coordination Question 47
47. Good vision depends on adequate intake of carotene rich food.
Select the best option from the following statements :
[2017]
(i) Vitamin A derivatives are formed from carotene
(ii) The photopigments are embedded in the membrane discs of the inner segment
(iii) Retinal is a derivative of Vitamin A
(iv) Retinal is a light absorbing part of all the visual photopigments
(a) (i), (iii) and (iv)
(b) (i) and (iii)
(c) (ii), (iii) and (iv)
(d) (i) and (iv)
Show Answer
Answer : a
Hints & Solutions
(a) Carotene is the source of retinal which is involved in formation of rhodopsin of rod cells. Retinal, a derivative of vitamin A, is the lightabsorbing part of all visual photopigments. Photopigments are occur entirely on the surface of membrane disc.
