Question

Name: CHEM 131 3. (8 pts) What type of interaction is expected between the side chains of the following pairs of amino acids (examples include salt bridges, H-bonding, disulfide bonds and dispersion forces)? Tyrosine and asparagine a) b) Leucine and proline c) two cysteines Give an example of two amino acids that could form a salt bridge (chemical structure or 3 letter d) code) 4. (10 pts) ldentify in which structural feature (1, 2" or 3" structure) of a protein or enzyme each of the following interactions or features are present. a-helix a. Salt bridges b. Hydrogen bonding between backbone C. Dispersion forces d. Amide bonds e. 5. (10 pts) Determine if the following statements are true or false. Circle the correct answer. False True OF a) The anomeric carbon determines if a sugar is D or L False b) A compound that has both a +1 and-1 charge are called zwitterions with a net charge of 0. True or False True or c) Amine containing drugs are typically formulated as the ammonium derivative to increase solubility. False or True d) Enzymes catalyze a reaction by binding a substrate in their binding site. False e) a Glycosidase (enzyme that cleaves glycosidic linkages) is able to hydrolyze B-glycosidic linkages. True or