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Vitamins and Coenzymes

Vitamins and Coenzymes
Which of these is a symptom of vitamin A deficiency?

Osteoporosis
Impaired blood clotting
Blindness
Impaired taste perception

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

fishes
animals
micro-organisms
plants

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

thrombin
fibrin
fibrinogen
prothrombin

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Vitamins and Coenzymes
Ascorbic acid acts as an

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

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

Pyridoxamine
Pyridoxine
All of these
Pyridoxal

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

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

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