Exam3_key_jmb_s07 - University of Houston BCHS 3304 Exam...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
University of Houston BCHS 3304 Exam III Instructor Dr. Briggs Apr. 05, 2007 Printed Name_____ANSWER KEY ________ LAST, FIRST Student ID#: Multiple choice, 2 pts each (100 pts) – Circle letter (i.e. a., b., c., d., or e.) of the most correct answer, then mark it on the Scantron sheet with a #2 pencil. Mark BOTH the exam AND the Scantron sheet. A table of half reactions and graph paper are at the end of this exam. 1). What is the Michaelis-Menton expression under uncompetitive inhibition? a. [S] ' K [S] V v M max 0 α + = b. [S] ' K [S] V v M max 0 + = c. [S] K [S] V v M max 0 + = d. [S] K [S] V v M max 0 + = e. [S] K [S] V v M max 0 + = 2). What is the Lineweaver-Burke expression under competitive inhibition? a. max max M 0 V α ' [S] 1 V α K v 1 + = b. max max M 0 V α ' [S] 1 V K v 1 + = c. max max M 0 V 1 [S] 1 V α K v 1 + = d. max max M 0 V 1 [S] 1 V K v 1 + = e. [S] K [S] V v M max 0 + = 3). How many sugar molecules does an ketotetrose represent? a. One b. Two c. Three d. Four e. Five 4). What kind of functional group does an aldose contain? a. Aldehyde b. Ketone c. Ketene d. Aldane e. Hexane
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
5). How many carbon atoms does fructose contain? a. Three b. Four c. Five d. Six e. Seven 6). The cyclic six-membered ring form of a sugar is called: a. Pyranose b. Fructose c. Glyceraldehyde d. Furanose e. Ribose 7). Which closed-ring form of D-glucose is most energetically stable? a. α -D-glucopyranose b. β -D-glucopyranose c. α -D-glucofuranose d. β -D-glucofuranose e. α -D-galactose OH H CH 2 OH OH OH OH O OH H O H O O H OH HOCH 2 O CH 2 OH H H OH H OH OH H OH H OH OH CH 2 OH OH OH H O H OH O O O H OH HOCH 2 O CH 2 OH H H OH H OH OH H H OH alpha-D-glucopyranose beta-D-glucopyranose a e a a a a a a a a a e e e e e e e e e
Background image of page 2
8). In what conformation does lysozyme cause the D-ring sugar to adopt in its substrate in order to facilitate catalysis? a. Chair b. Bent chair c. Three legged chair d. Half chair e. Boat 9). What is the identity of the catalytic triad in serine proteases? a. Asp-Tyr-Ser b. His-Trp-Ser c. Lys-His-Ser d. Arg-Trp-Ser e. Asp-His-Ser 10). What is the most suitable substrate for lysozyme? a. NAM-NAG b. NAM-NAM c. MAN-MAN d. NMA-NMG e. NUM-NUM 11). What are the catalytic residues of lysozyme? a. Asp/Glu b. Lys/Arg c. His/Lys d. Ser/Glu e. His/Ser 12). Catabolism is: a. The synthesis of complex molecules from simple ones b. Degradation of complex molecules into simple ones c. The eating of human flesh d. The acquisition of free energy from sunlight e. Self-feeding organisms 13). What is the highest energy phosphate containing compound that we’ve discussed? a. Glucose-6-phosphate b. Phosphoenolpyruvate c. ATP d. Fructose-6-phosphate e. 1,3-BPG 14). What gets put into the oxyanion hole in the active site of serine proteases? a. A water molecule used in the nucleophilic attack on the peptide substrate b. The C=O group in the sidechain of an Asn residue in the substrate peptide c. The C=O group from the substrate peptide backbone d. The O- generated during attack of the substrate peptide backbone C=O e. The OH group of the side chain of the active site Ser residue
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
15).
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/05/2010 for the course BCHS 3305 taught by Professor Briggs during the Spring '10 term at University of Houston-Victoria.

Page1 / 16

Exam3_key_jmb_s07 - University of Houston BCHS 3304 Exam...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online