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Amino Acids - MCAT Practice Questions

Amino acids are defined as simple organic compounds that contain which two functional groups?
Carboxyl (—COOH) and Amine (—NH₂)






What functional group is described as a basic nitrogen atom with a lone pair of electrons?
Amine






An amide functional group is characterized by a carbonyl group linked to which other atom?
Nitrogen






The formation of a peptide bond is a condensation reaction in which the N-terminus of one amino acid nucleophilically attacks the C-terminus of another. This reaction involves the elimination of which molecule?
Water (H₂O)






Rotation around the C–N bond in a peptide linkage is restricted due to:
Resonance, which gives the bond a partial double bond character






Proteins are best described as large, folded, functional molecules made up of multiple amino acids linked by:
Peptide bonds






Which of the following classes of compounds are hydrocarbon compounds containing carbon and hydrogen joined together in straight chains, branched chains, or non-aromatic rings?
Aliphatic compounds






Which laboratory synthesis method generates an amino acid starting from an aldehyde?
Strecker synthesis






Which of the following reagents is required for the Gabriel synthesis of an amino acid?
Potassium phthalimide






Which statement is TRUE regarding peptide bonds?
They can be cleaved hydrolytically using a strong acid or base