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Vitamins and Coenzymes

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

fibrinogen
fibrin
thrombin
prothrombin

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Vitamins and Coenzymes
Vitamin-D deficiency can cause

cataract
beri-beri
rickets
pernicious anemia

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

All of these
Pyridoxal
Pyridoxamine
Pyridoxine

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

micro-organisms
plants
fishes
animals

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Vitamins and Coenzymes
In the co-enzyme B12the position occupied by a cyanide ion in vitamin B12 is bonded directly to the __________ of the ribose of adenosine.

hydroxycobalamin
5-6 dimethylbenzimidazole
adenine
cyanocobalamin

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

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

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