16. Cellular isozymes of pyruvate kinase are allosterically inhibited by: (A) high concentrations of AMP. (B) high concentrations of ATP. (C) high concentrations of citrate. (D) low concentrations of acetyl-CoA. (E) low concentrations of ATP.

8. An α helix would be destabilized most by: (A) an electric dipole spanning several peptide bonds throughout the α helix. (B) interactions between neighboring Asp and Arg residues. (C) interactions between two adjacent hydrophobic Val residues. (D) the presence of an Arg residue near the carboxyl terminus of the α helix. (E) the presence of two Lys residues near the amino terminus of the α helix.

16. Cellular isozymes of pyruvate kinase are allosterically inhibited by:
(A) high concentrations of AMP.
(B) high concentrations of ATP.
(C) high concentrations of citrate.
(D) low concentrations of acetyl-CoA.
(E) low concentrations of ATP.

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