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Vitamins and Coenzymes

Vitamins and Coenzymes
E.coli ACP has its molecular weight as around

90,000
19000
9000
39000

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

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

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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
What metal ion is specifically bound by vitamin B12?

Cobalt
Zinc
Copper
Iron

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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
β-carotene together with α-carotene, γ-carotene and cryptoxanthine are synthesized by

none of these
plants
plants and animals both
animal

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