3. Amino Acids

In studies involving model tetrapeptides, to which atom is 7-amino-4-methylcoumarin (AMC) covalently attached?

Which of the following primarily dictates the three-dimensional structure of a protein molecule synthesized by the body?

At physiological pH (approximately 7.4), what is the net charge on the carboxyl terminal of amino acids in proteins?

Which of the following is NOT attached to the central (alpha) carbon atom in a standard amino acid?

Which amino acid residues in hemoglobin are primarily carbamylated at low pH?

Which part of an amino acid is always acidic?

Which of the following best describes the side chain of arginine at a pH of 11?

Which of the following functional groups of an amino acid would be in the ionized (deprotonated) state at high pH?

If an aminoacyl-tRNA synthetase adds the wrong amino acid to a tRNA, what is the most likely consequence during protein synthesis?

Which of the following amino acids has more than one asymmetric (chiral) center?