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
- A(a), (c) & (d)
- B(a) & (c)
- C(b), (c) & (d)
- D(a) & (b)
Solution & Step-by-step Explanation
(a) Correct: Carotenes (like -carotene) are precursors to Vitamin A (Retinol).(b) Incorrect: Photopigments are in the membrane discs of the outer segment of photoreceptors (rods and cones).(c) Correct: Retinal (an aldehyde) is a derivative of Retinol (alcohol).(d) Correct: Retinal is the chromophore (light-absorbing part) combined with the protein opsin.