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Vitamins and Coenzymes

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

fishes
animals
plants
micro-organisms

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

19000
39000
90,000
9000

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

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

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Vitamins and Coenzymes
Which of the following are reduced coenzymes?

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

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Vitamins and Coenzymes
Vitamins are essential because the organism

can't synthesize these compounds in the adequate amounts
can't synthesize these compounds at all
None of these
can synthesize these compounds partially

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Vitamins and Coenzymes
What metal ion is specifically bound by vitamin B12?

Copper
Cobalt
Iron
Zinc

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