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Question

Vitamin A is needed for the synthesis of
Rhodopsin
Night blindness
Pellagra
Cirrhosis

A

Rhodopsin

B

Night blindness

C

Pellagra

D

Cirrhosis

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Solution

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Vitamin A is required for the formation of the photoreceptor rhodopsin, which is a complex of retinal and the vision protein opsin, where retinal functions as the chromophore. Rhodopsins are found in animals and green algae where they act as regulators of light-activated photochannels and in archae where they act as light-driven in pumps.
Therefore, the correct answer is option A.

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