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Unformatted text preview: NAME: _____________________ (Please print) BMB – 258 - EXAMINATION I February 19, 2004 KEY During this exam you should not be in possession of a beeper or a cellular phone. Please place your beeper or cellular phone in your book bag (after you turn it off!!) and place the bag against the wall of the room. You can only use calculators that do not have memory capabilities for alphabetic characters. Other calculators should also be placed in your bag. THESE ARE STANDARD SINGLE ANSWER MULTIPLE CHOICE QUESTIONS. THE POSSIBLE ANSWERS ARE LABELED A, B, C, D AND E. SELECT THE SINGLE BEST ANSWER FOR QUESTIONS 1-24 AND FILL IN THE CORRESPONDING CIRCLE ON THE SCANTRON SHEET. PRINT YOUR NAME ON THIS PAGE AND ON EACH OF THE SHORT ANSWER / FILL-IN PAGES. 1. Given a sample of pure DNA, what is the minimum number of the bases, A, C, G, T, you would have to analyze for in order to learn the % of each base present? A. 1 B. 2 C. 3 D. 4 2. In a typical cell, which combination represents the usual ratios of reduced/oxidized forms of the two coenzymes? NADH/NAD + NADPH/NADP + A. Low Low B. Low High C. High Low D. High High 3. Which type of linkage is found in proteins? A. hydrogen bond B. disulfide bond C. hydrophobic interaction D. ionic bond E. all of the above 4. A second messenger is? A. a product released by a hormone B. a hormone C. an activated intermediate D. a coenzyme E. a feedback inhibitor ©2004/Dept. of Biochemistry & Molecular Biology 1 of 8 5. What would be the DNA sequence formed by reverse transcriptase from the RNA sequence AUCGC? A. TAGCG B. ATCGC C. GATCT D. TCAGA E. TACGC 6. The total activity of an enzyme in a cell may be regulated by which of the following? A. rate of enzyme synthesis B. rate of enzyme degradation C. phosphorylation of the enzyme D. presence of allosteric effectors E. all of the above 7. Which two functional groups are found in all amino acids? A. amino and amide B. carbonyl and amino C. carbonyl and amide D. carboxyl and amino E. amino and hydroxyl 8. Which of the following statements about protein structure is correct?...
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This document was uploaded on 11/04/2011 for the course BMB 258 at University of Miami.
- Fall '06