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Vitamins and Coenzymes

Vitamins and Coenzymes
Which of the following are reduced coenzymes?

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

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Vitamins and Coenzymes
Vitamin K1 was first isolated from alfalalfa and has the phytyl side chain consisting of

four isoprene units
six isoprene units
nine isoprene units
four isoprene units

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

Pyridoxine
Pyridoxal
All of these
Pyridoxamine

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Vitamins and Coenzymes
A deficiency of niacin causes

cataract
anemia
pellagra
scurvy

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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

fibrinogen
thrombin
prothrombin
fibrin

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