What level of protein structure includes polypeptide aggregates?   A. Secondary   B. Quaternary   C. Primary   D. Tertiary

Which of the following amino acid or types of amino acids are are rarely found in beta sheets? a. Polar charged amino acids  b. Polar uncharged amino acids  c. Non polar amino acids  D. Glycine

1. Is there more than one way to fold a protein, given the conflicting demands of the different "R" groups and the protein existing in a watery environment? 2. Explain what an R group is. 3. Compare the backbone of a polypeptide with that of a nucleic acid. 4. Proteins perform critical functions in all of our cells. Without proteins, life wouldn’t exist. Think of some specific proteins and describe what function they perform.  5. Explain the difference between secondary and tertiary protein structures.

Explain why unfolding or aggrrgation may occur using changes in entropy and enthalpy of the protein and water. a. The shift of a pH from pH 7 to pH 11 b. Addition of Triton-x (detergent) into buffer c. Raising the temperature of the solution from 25 C to 100 C

Briefly explain how an epitope can be used to study how many subunits are in a protein complex.

How would adding acid to a non-buffered solution be most likely to affect protein structure? Select one: a. Adding acid would disrupt the primary structure of the protein b. Adding acid would cause the protein to become a lipid c. Adding acid would cause the protein to become a carbohydrate d. Adding acid would disrupt the secondary and tertiary structure of the protein