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Vitamins and Coenzymes

Vitamins and Coenzymes
Ascorbic acid acts as an

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

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Vitamins and Coenzymes
The absence of ascorbic acid in the human diet gives rise to

rickets
pernicious anemia
cataract
beri-beri

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Vitamins and Coenzymes
An enzyme, L-folate reductase reduces folic acid to

tetrahydrofolic acid
dihydrofolic acid
trihydrofolic acid
hydrofolic acid

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Vitamins and Coenzymes
Dihydroorotate dehydrogenase contains

4 flavins and 2 atoms of iron per molecule
4 flavins and 4 atoms of iron per molecule
2 flavins and 4 atoms of iron per molecule
2 flavins and 2 atoms of iron per molecule

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Vitamins and Coenzymes
The reductant, NADH, transfers the electrons via a flavo-proteins to the specific disulfide (S-S) protein to form a dithiol (SH,SH) protein which converts vitamin

B12(Co2+)to B12(Co+)
B12(Co) to B12(Co2+)
B12(Co2+)to B12(Co)
B12(Co+)to B12(Co2+)

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Vitamins and Coenzymes
The most prominent role that tocopherol has in in-vitro systems is as a strong

all of these
antioxidants
oxidizing agent
reducing agent

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