Which of the Following Forms of Vitamin a Is Covalently $\beta$

question 17

Multiple Choice

Which of the following forms of vitamin A is covalently attached to a lysine residue of the protein opsin to form the complex called rhodopsin?

• A)all-trans-retinal
• B)11-cis-retinal
• C)all-trans-retinoic acid
• D)all-trans-retinol
• E)\(\beta\)-carotene

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