Test 1 - Spring 05 practice - For EXAM I, BCM 3023 Spring...

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For EXAM I, BCM 3023 Spring 2005 Under several of these questions, the courses in which you studied background material would have been helpful.l 1. Substances which are optically active: a. rotate plane polarized light b. are fluorescent c. absorb ultraviolet light d. react to emit phosphorescence e. can be quantified using a spectrophotometer ORGANIC CHEMISTRY 2. Which of the following tetrapeptides would be most NEGATIVELY charged at pH 6.0? a. arg-lys-val-val b. his-glu-gly-asp c. met-met-val-leu d. arg-arg-his-cys e. trp-tyr-arg-lys 3. Which of the following is closest to the pH of a solution containing 0.1 M sodium acetate and 0.3 M acetic acid ? [the pK value for acetic acid is 4.70] a. 4.22 b. 5.18 c. 4.37 d. 8.03 e. 5.55 GENERAL CHEMISTRY ALGEBRA 4. What of the following is closest to the isoelectric point of methionine? a. 2.5 b. 4.6 c. 5.9 d. 7.8 e. 11.2 5. The pK value for the reaction: H 2 PO 4 -1 HPO 4 -2 + H + is at pH 6.9 If more H 2 PO 4 -1 is added to a mixture of H 2 PO 4 -1 and HPO 4 -2 , what will happen? a. no change in pH b. the pH will increase c. the pH will decrease d. it depends on the concentration of each of the components e. no change in pH but the pI will decrease GENERAL CHEMISTRY
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6. Although this is rarely observed in proteins, the side chains of which pair of amino acids have the potential to react to form an amide bond? a. Histidine, cysteine b. Arginine, aspartic acid c. Lysine, glutamic acid d. Arginine, histidine e. Arginine, tyrosine ORGANIC CHEMISTRY 7. In the Meselson/Stahl experiment, after four generations of replication, what percentage of duplex DNA molecules will contain a single N-15 and N-14 labelled strand? a. 6.25 b. 12.5 c. 18.75 d. 25 e. 100 GENERAL BIOLOGY 8. The side chains of which pair of amino acids can form of a hydrophobic interaction? a.
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This note was uploaded on 04/14/2010 for the course BHC 3023 taught by Professor Harmen during the Spring '10 term at University of South Florida - Tampa.

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Test 1 - Spring 05 practice - For EXAM I, BCM 3023 Spring...

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