311C Exam2 KEY - Name _KEY_ BIO 311C Exam 2 *You MUST write...

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Name ________ KEY ______ BIO 311C Exam 2 *****You MUST write your name on all pages of the exam. Points will be deducted if you do not !!***** Multiple Choice (2 points each). Carefully read each question/statement and choose the best response. Write your answer on the line provided. Points will be deducted if you do not clearly write your choice on the line ! 1. ______ When a potassium ion (K + ) moves from the soil into the vacuole of a cell on the surface of a root, it must pass through several cellular structures. Which of the following correctly describes the order in which these structures will be encountered by the ion? primary cell wall plasma membrane cytoplasm vacuole 2. ______ The ATP made during fermentation is generated by which of the following? Substrate-level phosphorylation 3. ______ An animal cell lacking oligosaccharides on the external surface of its plasma membrane would likely be impaired in which function? Cell-cell recognition 4. ______ What kinds of molecules diffuse through a cell membrane most easily? Small and hydrophobic 5. ______ The extracellular matrix is thought to participate in the regulation of animal cell behavior by communicating information from the outside of the cell to the inside of the cell via integrins. 6. ______ Which of the following best describes the cytoskeletal structure of cilia? 9 microtubule doublets surrounding 2 microtubules. 7. ______ A receptor-tyrosine kinase (RTK) is a transmembrane protein with an extracellular ligand binding site and an intracellular (cytoplasmic) kinase domain. When the RTK protein is first synthesized in the rough ER, on what side of the ER membrane will the kinase domain be found? It will be on the cytoplasmic side of the ER. 8. ______ Which of the following statements correctly describe(s) anabolic pathways? They consume energy to build up polymers from monomers. 9. _____ An enzyme catalyzes a reaction by Lowering the activation energy of a reaction. 10. ______ Which of the following would be true for a cell that lacks the ability to hydrolyze GTP to GDP + P i ? It would not be able to inactivate a G protein 11. ______ In the reaction A B + C + heat, the potential energy of the products is less than that of the reactant.
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12. ______ The concentration of calcium ions in the cytosol is actively maintained well below that outside of the cell. Which of the following is the best explanation for the inability of an animal cell to maintain its low calcium ion concentration? Insufficient ATP levels in the cytoplasm.
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This note was uploaded on 02/10/2009 for the course BIO 311C taught by Professor Satasivian during the Fall '08 term at University of Texas at Austin.

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311C Exam2 KEY - Name _KEY_ BIO 311C Exam 2 *You MUST write...

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