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Different from enzymes that have proenzyme forms, no vitamin has any pro-vitamin form in animal tissues. 

A deficiency of which vitamin in humans can lead to a clinical syndrome called “Beriberi”?(A) Vitamin B1(B) Vitamin B2(C) Vitamin B3(D) Vitamin B4 (E) Vitamin B5

Which one of the following monosaccharides does not have 6 carbon atoms in its single molecule.

After a complete oxidation outside of an animal body, 2 grams of protein can release approximately 11 to 12 kilocalories of gross energy.

Pyruvate dehydrogenase pathway takes place in mitochondria.

Who was called the “Father of Modern Nutrition and Chemistry”?(A) Hypocrites (460–370 BC) (B) Antoine Lavoisier (1743-1794)(C) George Washington (1732-1799)(D) Albert Einstein (1879-1955)(E) Isaac Newton (1642-1726)(F) Abraham Lincoln (1809–1865)

Following an abrupt increase in grain intake, soon after pasture grazing, a beef cattle can readily develop a condition called metabolic acidosis. Which acid is mainly responsible for this condition?(A)   Acetic acid(B)   Butyric acid(C)   Propionic acid(D)   Pyruvic acid(E)   Lactic acid

For fatty acids, when you increase its number of double bonds you will decrease its melting point.

After 4 canonical catabolic pathways, one glucose molecule can be totally oxidized to 6 CO2 molecules, and about 40% of its energy will be finally trapped in _______ ATP molecules. (A)    6 (B)  36(C)  28(D)  26(E)    8

Urea is an example of non-protein nitrogen (NPN) and can contribute nitrogen for ruminal microorganisms to synthesize amino acids.