Chemistry > QUESTIONS & ANSWERS > Proteins Primary Secondary Teritary Structures (All)

Proteins Primary Secondary Teritary Structures

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1. Amino acid side chains capable of forming hydrogen bonds are usually located on the protein ____ and form hydrogen bonds primarily with the ____. a. surface, water solvent b. interior, water sol ... vent c. surface, other amino acid side chains d. interior, other amino acid side chains e. all are true ANS: A PTS: 1 2. ____ amino acids are almost never found in the interior of a protein, but the protein surface may consist of ____ amino acids. a. Nonpolar, both polar and nonpolar b. Nonpolar, mostly nonpolar c. Polar, both polar and nonpolar d. Polar, only polar e. Polar, only nonpolar ANS: C PTS: 1 3. Electrostatic interactions among amino acid residues on proteins may be damped out by high concentrations of: a. water. b. organic solvents. c. salts. d. heat. e. all of the above. ANS: C PTS: 1 4. An electrostatic interaction might occur within a protein between which of the following amino acid pairs at typical physiological pH? a. Ser/Asn b. Asp/Glu c. Arg/Cys d. Lys/Asp e. Val/Ile ANS: D PTS: 1 5. ____ between tightly packed amino acid side chains in the interior of the protein are a major contribution to protein structure. a. Hydrogen bonds b. Electrostatic interactions c. Covalent ester bonds d. Van der Waals interactions e. All are true [Show More]

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