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Vitamins and Coenzymes

Vitamins and Coenzymes
A deficiency of Vitamin K results in a decreased level of

thrombin
prothrombin
fibrinogen
fibrin

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Vitamins and Coenzymes
Dihydroorotate dehydrogenase contains

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

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

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

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

reducing agent
all of these
oxidizing agent
antioxidants

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Vitamins and Coenzymes
Which of the following compounds/(s) belong/(s) to the vitamin B6 group?

All of these
Pyridoxine
Pyridoxamine
Pyridoxal

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Vitamins and Coenzymes
Models of end-linked Osaka VI Fibrinogen dimers, a bilayer dimer is linked at

both ends by one disulfide bond
either end via two disulfide bonds
either end via a single disulfide bond
both ends by two disulfide bonds

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