GK
VITAMINS MINERALS COENZYMES AND DEFICIENCY DISEASES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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plants
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animal
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plants and animals both
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none of these
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Detailed explanation-1: --Carotene and -carotene are provitamin A carotenoids, meaning they can be converted in the body to vitamin A. The vitamin A activity of -carotene in food is 1⁄12 that of retinol (preformed vitamin A). Thus, it would take 12 µg of -carotene from food to provide the equivalent of 1 µg (0.001 mg) of retinol.
Detailed explanation-2: --Carotene (gamma-carotene) is a carotenoid, and is a biosynthetic intermediate for cyclized carotenoid synthesis in plants. It is formed from cyclization of lycopene by lycopene cyclase epsilon. Along with several other carotenoids, -Carotene is a vitamer of vitamin A in herbivores and omnivores.
Detailed explanation-3: -Among the methods of , -carotene synthesis are the reactions of dehydration and elimination, the selective condensation reaction of carbonyl compounds and the homo-dimerization reaction, and the selective coupling reaction of Csp2–Csp2 (Bienayme 1994; Fontan et al., 2013).