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Vitamins and Coenzymes

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

thrombin
fibrin
prothrombin
fibrinogen

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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
de-stabilize the semiquinone
stabilize the semiquinone

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Vitamins and Coenzymes
Which of the following are reduced coenzymes?

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

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Vitamins and Coenzymes
Ascorbic acid acts as an

oxidizing agent
oxidizing and reducing agent both
None of these
reducing agent

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Vitamins and Coenzymes
What compound of raw egg white causes a syndrome similar to vitamin B deficiency?

Avidin
Albumin
Betabindin
Ovalbumin

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Vitamins and Coenzymes
The vitamin niacin is part of the __________ molecule.

NAD+
pyridoxal phosphate
pyrophosphate
ferredoxin

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