Good vision depends on adequate intake of carotene rich food. Select the best option from the following statements :
Good vision depends on adequate intake of carotene rich food. Select the best option from the following statements :
(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 Options
(1) (i), (iii) and (iv)
(2) (i) and (iii)
(3) (ii), (iii) and (iv)
(4) (i) and (iv)
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The correct answer is (1)
Carotene is the source of retinal which is involved in formation of rhodopsin of rod cells. Retinal, a derivative of vitamin A, is the light-absorbing part of all visual photopigments. Photopigments are occur entirely on the surface of membrane disc.
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