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Vitamins and Coenzymes

Vitamins and Coenzymes
A deficiency of niacin causes

scurvy
pellagra
cataract
anemia

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Vitamins and Coenzymes
Vitamins are essential because the organism

can synthesize these compounds partially
can't synthesize these compounds at all
can't synthesize these compounds in the adequate amounts
None of these

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Vitamins and Coenzymes
β-carotene together with α-carotene, γ-carotene and cryptoxanthine are synthesized by

plants
plants and animals both
none of these
animal

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Vitamins and Coenzymes
Selenium is an essential component of the enzyme glutathione peroxidase which

scavenges toxic hydoperoxycompounds in tissues
reduces toxic hydoperoxycompounds in tissues
oxidizes toxic hydoperoxycompounds in tissues
None of these

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

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

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Vitamins and Coenzymes
Which of these hormones is a catecholamine?

Norepinephrine
Follitropin
Tetraiodothyronine
Tetrahydrofolate

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