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Neural Control and Coordination

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  1. Which one of the following statements is not correct?
    1. Retinal is the light absorbing portion of visual photo pigments.
    2. In retina the rods have the photopigment rhodopsin while cones have three different photopigments.
    3. Retinal is a derivative of Vitamin C.
    4. Rhodopsin is the purplish red protein present in rods only.
Correct Option: C

Retinal is a derivative of vitamin A. Retinal is a polyene chromophore, and bound to proteins called opsins, is the chemical basis of animal vision. Bound to proteins called type 1 rhodopsins, retinal allows certain microorganisms to convert light into metabolic energy.


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