In animal body, only the L-amino acids (not the D-amino acids) can be used as building blocks for protein synthesis.

How many CO2 molecules are generated from one complete Citric Acid Cycle?

Alanine dehydrogenase can remove an ammonia (-NH3) group from an alanine molecule, and after that the alanine molecule will become ___________. 

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.

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)

Pyruvate dehydrogenase pathway takes place in mitochondria.

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