Sense organs – photoreceptors and visual pigments

2017 1 question

1. Good vision depends on adequate intake of carotene rich food. 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