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Vitamins and Coenzymes

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

night blindness
keratinization
none of these
xeropthalmia

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Vitamins and Coenzymes
Vitamin B12 (Cobalamin) is only synthesized by

animals
fishes
plants
micro-organisms

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Vitamins and Coenzymes
Which of the following are reduced coenzymes?

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

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Vitamins and Coenzymes
The most prominent role that tocopherol has in in-vitro systems is as a strong

all of these
oxidizing agent
antioxidants
reducing agent

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Vitamins and Coenzymes
β-carotene together with α-carotene, γ-carotene and cryptoxanthine are synthesized by

plants
animal
none of these
plants and animals both

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Vitamins and Coenzymes
The disease Beriberi is due to a dietary deficiency in

vitamin B1 (thiamine)
vitamin B12
vitamin B6 (pyridoxine)
vitamin B2 (riboflavin)

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