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Vitamins and Coenzymes

Vitamins and Coenzymes
Which of these molecules is vitamin H?

Carnitine
None of these
Biotin
Folic acid

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Vitamins and Coenzymes
Ascorbic acid acts as an

oxidizing and reducing agent both
oxidizing agent
None of these
reducing agent

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

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

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Vitamins and Coenzymes
Lipoic acid exists in

reduced form
oxidized form
none of these
oxidized and reduced form both

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Vitamins and Coenzymes
The symptoms of retinol excess are

weakness
all of these
bone fragility
nausea

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Vitamins and Coenzymes
The occurrence of metals such as iron or molybdenum in some flavoproteins can

stabilize the semiquinone
all of these
form chelation
de-stabilize the semiquinone

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