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Vitamins and Coenzymes

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

antioxidants
oxidizing agent
all of these
reducing agent

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Vitamins and Coenzymes
Dihydroorotate dehydrogenase contains

2 flavins and 4 atoms of iron per molecule
2 flavins and 2 atoms of iron per molecule
4 flavins and 4 atoms of iron per molecule
4 flavins and 2 atoms of iron per molecule

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

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

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Vitamins and Coenzymes
Which of the following are reduced coenzymes?

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

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Vitamins and Coenzymes
A deficiency of niacin causes

anemia
scurvy
cataract
pellagra

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Vitamins and Coenzymes
Lipoic acid exists in

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

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