Vitamin a Plays a Critical Role in Night Vision Because

question 40

Multiple Choice

Vitamin A plays a critical role in night vision because:

• A)it is required for the synthesis of the retinal portion of rhodopsin.
• B)it is transformed into the opsins found in cone cells.
• C)it acts as the coenzyme required to degrade scotopsin in brightly lit circumstances.
• D)it catalyzes the mitotic generation of light-reflecting epithelial cells which support widely dispersed rod receptors.
• E)it deactivates the photopigment-transducing chemical pathways within cone cells.

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