BMB258 S04 T2 KEY

BMB258 S04 T2 KEY - NAME: _ (Please print) BMB 258 -...

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NAME: _____________________ (Please print) BMB – 258 - EXAMINATION II KEY March 30, 2004 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. Use of calculators is not permitted. 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. One of the following cannot be formed in the Krebs’ cycle. Which one? A. ATP B. FADH 2 C. NADPH D. NADH E. GTP 2. Which metabolic intermediate accumulates when the Krebs’ cycle is depleted of intermediates? A. oxaloacetate B. acetyl CoA C. glyceraldehyde 3-phosphate D. citrate E. lactate 3. Which foodstuff should be avoided by the majority of the population in order to prevent diarrhea? A. orange juice B. apples C. red meat D. milk E. fish 4. Which product of glycolysis escapes the muscle cell after vigorous exercise? A. fructose 1,6-bisphosphate B. dihydroxyacetone phosphate C. phosphoenolpyruvate D. pyruvate E. fructose 6-phosphate Page 1 of 11
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5. Which of the following statements is correct? A. In glycolysis all intermediates between glucose and pyruvate are phosphorylated as well as the intermediates of the Krebs’ cycle B. In glycolysis and the Krebs’ cycle all intermediates are di- or tri-carboxylic acids C. NADH and FADH 2 are formed during aerobic glycolysis and in the Krebs’ cycle D. Glycolysis and the Krebs’ cycle are both regulated by the Pasteur effect 6. The Krebs’ cycle: A. converts dietary carbon into CO 2 B. is unidirectional C. functions only in aerobic conditions D. A and B are correct E. A, B, and C are correct 7. All of the following apply to DNA replication EXCEPT A. Bidirectional B. Discontinuous C. Originates at distinct sites D. Requires a promoter E. Semi-conservative Note: a promoter is involved in RNA synthesis. 8. Which of the following is found farther away from the actual replication fork than the other proteins in the list? A. DNA polymerases B. Helicase C. Ligase D. Primase of the lagging strand E. SSB proteins 9. Evaluate the following statements. This question was deleted. A. A compound that has AMP bound to the carboxylic acid group of an amino acid is an intermediate in the loading of that amino acid onto its tRNA. B. A compound that has pyrophosphate bound to the carboxylic acid group of a fatty acid is an intermediate in the loading of that fatty acid onto coenzyme A. C.
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This document was uploaded on 11/04/2011 for the course BMB 258 at University of Miami.

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BMB258 S04 T2 KEY - NAME: _ (Please print) BMB 258 -...

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