3
Question
Good vision depends on adequate intake of carotene-rich foods.
Select the best option from the following statements.
(a) Vitamin A derivatives are formed from carotene.
(b) The photopigments are embedded in the membrane discs of the inner segment.
(c) Retinal is a derivative of Vitamin A.
(d) Retinal is a light absorbing part of all the visual photopigments.
Good vision depends on adequate intake of carotene-rich foods.
Select the best option from the following statements.
(a) Vitamin A derivatives are formed from carotene.
(b) The photopigments are embedded in the membrane discs of the inner segment.
(c) Retinal is a derivative of Vitamin A.
(d) Retinal is a light absorbing part of all the visual photopigments.
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Solution
The correct option is B 1, 3 and 4
The photoreceptor cells of the retina contain the photopigments, opsin and retinal.
Retinal is an aldehyde derivative of vitamin A. Hence, c is correct.
Vitamin A derivatives are formed from carotene in the liver. So, adequate intake of carotene-rich foods helps to maintain good vision. Hence, a is correct.
The photopigments are embedded in the membrane discs of the outer segment but not the inner segment. Hence, b is incorrect.
Retinal is a light absorbing part of all the visual photopigments. Hence, d is correct.
The photoreceptor cells of the retina contain the photopigments, opsin and retinal.
Retinal is an aldehyde derivative of vitamin A. Hence, c is correct.
Vitamin A derivatives are formed from carotene in the liver. So, adequate intake of carotene-rich foods helps to maintain good vision. Hence, a is correct.
The photopigments are embedded in the membrane discs of the outer segment but not the inner segment. Hence, b is incorrect.
Retinal is a light absorbing part of all the visual photopigments. Hence, d is correct.
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