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Vitamins and Coenzymes

Vitamins and Coenzymes
The vitamin riboflavin is part of the __________ molecule.

pyrophosphate
pyridoxal phosphat
ferredoxin
FAD

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

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

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

fishes
animals
plants
micro-organisms

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Vitamins and Coenzymes
Biotin occurs mainly in combined forms bound to protein through

ε-N-lysine moiety
ε-N-biotinyl-L-lysine
ε-N-lipoyl - L-lysine
ε-S-lysine moiety

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Vitamins and Coenzymes
An example of a digestive hormone is

lipase
gastrin
amylase
pepsin

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Vitamins and Coenzymes
Ascorbic acid acts as an

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

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