What molecule in the retina requires Vitamin A derived from pumpkin's beta-carotene for proper function?
Answer
Rhodopsin
Rhodopsin is the light-absorbing molecule found specifically within the retina of the eye. The text explicitly states that Vitamin A, which the body synthesizes from the beta-carotene concentrated in pumpkin flesh, is necessary for the proper production of rhodopsin. Insufficient Vitamin A impairs this function, leading to issues like night blindness. While lutein and zeaxanthin also support eye health by protecting against blue light, and the cornea relies on Vitamin A for structure, rhodopsin is the specific molecule whose function is directly tied to the production of this pigment molecule essential for vision.
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