Biochemistry Quiz

Briefly describe the role of entropy and enthalpy in biochemical reactions.

Define free energy (ΔG), standard free energy, and the equilibrium constant (Keq) as applied to biochemical reactions.

Explain what the isoelectric point means.

Identify the charge on a small peptide at a given pH.

Explain the role of Van der Waals forces, charge-charge interactions, hydrogen bonds, and hydrophobic interactions in protein and macromolecular architecture.

Name the 20 amino acids that commonly occur in proteins and classify them according to chirality, polarity, size, and charge.

Identify by structure, three-letter abbreviation, and one-letter abbreviation the 20 common amino acids individually and in a polypeptide chain of up to 15 residues.

Pair the one-letter and three-letter codes that identify amino acids, including selenocysteine with its respective amino acid.

Describe the bonds and forces (peptide, disulfide, and hydrogen bonds; hydrophobic, dipole-dipole, van der Waals, and electrostatic interactions) that contribute to the conformation of proteins and the interaction of proteins with other biomolecules.

Describe and recognize the basic structure of an amino acid, identifying the characteristics that all share and what differentiates them, including the ability to basically differentiate between non-polar, polar, and charged amino acids.