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Vitamins and Coenzymes

Vitamins and Coenzymes
Vitamin-C is considered as a

none of these
water soluble
fat soluble
fat and water soluble

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Vitamins and Coenzymes
Vitamin K1 was first isolated from alfalalfa and has the phytyl side chain consisting of

four isoprene units
six isoprene units
nine isoprene units
four isoprene units

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Vitamins and Coenzymes
Lipoic acid is a co-factor of the

di-hydroorotate dehydrogenase
α-ketoglutaric dehydrogenase
pyruvic dehydrogenase
both (a) and (b)

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Vitamins and Coenzymes
Which of the following are reduced coenzymes?

Coenzyme A and ubiquinone
NADH and FADH2
NAD+ and FAD
ATP and GTP

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Vitamins and Coenzymes
An early sign of retinol deficiencies in man is

none of these
night blindness
keratinization
xeropthalmia

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Vitamins and Coenzymes
Selenium is an essential component of the enzyme glutathione peroxidase which

oxidizes toxic hydoperoxycompounds in tissues
scavenges toxic hydoperoxycompounds in tissues
None of these
reduces toxic hydoperoxycompounds in tissues

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