VITAMINS AND COENZYMES QUIZ

The prosthetic group biotin is a carrier of which type of molecule?

Ammonia

Sulfhydryl group

Activated carbon dioxide (CO2)

Methyl group

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What metal ion is specifically bound by vitamin B12?

Zinc

Iron

Cobalt

Copper

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An example of a digestive hormone is

gastrin

pepsin

lipase

amylase

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Vitamin B12 is useful in the prevention and treatment of

pernicious anemia

scurvy

cataract

beri-beri

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Which of the following are reduced coenzymes?

NAD+ and FAD

ATP and GTP

NADH and FADH2

Coenzyme A and ubiquinone

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

Pyridoxal

All of these

Pyridoxamine

Pyridoxine

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Models of end-linked Osaka VI Fibrinogen dimers, a bilayer dimer is linked at

both ends by two disulfide bonds

either end via a single disulfide bond

either end via two disulfide bonds

both ends by one disulfide bond

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Which of these molecules is vitamin H?

Carnitine

Folic acid

None of these

Biotin

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The vitamin riboflavin, which occurs as a yellow pigment in egg yolk and milk become

colorless on oxidation and regained its color on reduction with Zn in acid

more deep in color on reduction with Zn in acid and regained its color on re-oxidation

more deep in color on oxidation and regained its color on reduction with Zn in acid

colorless on reduction with Zn in acid and regained its color on re-oxidation

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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(Co) to B12(Co2+)

B12(Co+)to B12(Co2+)

B12(Co2+)to B12(Co+)

B12(Co2+)to B12(Co)

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