Cells exam 4 - Cells Exam 4 December 8, 2006 Ver. A NAME_...

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Cells Exam 4 NAME__________________________________ December 8, 2006 Ver. A (2 pts each). Answer the multiple choice questions on the scantron sheet. Select the one choice that best answers the question. Answer the short answer questions in the space provided on the test form . Good luck. 1. Which of the following is TRUE about intermediate filaments a. they rapidly grow and shrink b. they grow out of the centrosome near the cell nucleus c. they are found in cilia and flagella d. they have motors associated with them that can transport vesicles e. none of the above are true 2. Proteins designated for the ____________ are made in the cytosol, threaded through a translocator, then properly fold. (fill in the blank) a. mitochondria b. nucleus c. vesicles d. endoplasmic reticulum e. plasma membrane 3. For which of the following processes are proteins transported across the membrane in their folded state? a. Translation b. Transport into the ER lumen c. Transport into the nucleus d. Transport into the mitochondria 4. Which of the following is an actin side-binding protein that controls access of myosin heads to the actin filament? a. troponin b. tropomyosin c. tropesin d. calcium 5. Where does protein synthesis take place for a protein designated for the cell surface? a. cytosol b. golgi apparatus c. mitochondria d. endoplasmic reticulum e. endosome 6. The protein gamma tubulin a. makes up the protofilaments of microtubules b. forms a ring from which microtubules can grow c. is an actin binding protein d. is a microtubule motor protein
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7. The major ion responsible for the maintenance of resting membrane potential is: a. K + b. Na + c. Cl - d. Ca ++ 8. Transport vesicles bud from the _______ Golgi network for __________. a. trans… endocytosis b. trans … exocytosis c. cis… phagocytosis d. trans… phagocytosis 9. Dynamic instability refers to a. the ability of intermediate filaments to rapidly shrink and grow b. the disintegration of actin filaments that occurs during cell division c. the rapid growth and shrinkage of microtubules in a cell d. the unstable attachment of microtubules to motor proteins like kinesin e. all of the above are true 10. The process by which cells ingest large particles like bacteria is called: a. phagocytosis b. pinocytosis c. super gulp d. transcytosis e. digestion 11. "9 + 2" refers to a. the organization of actin filaments in a flagellum b. the 9 single microtubules and 2 double microtubules in a flagellum c. the 9 doublet microtubules and 2 central single microtubules in a cilium d. the 9 intermediate filaments and 2 microtubules in a cilium 12. The term “depolarization” refers to: a. The affect that K + leak channels have on the intracellular concentration of K + b. The ability of the Na + /K + pump to establish concentration gradients c. The charge across the membrane before a stimulus is received d. The change in membrane potential from negative to positive 13. Where are endocytosed materials broken down? a.
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This note was uploaded on 04/21/2008 for the course BIO 101 taught by Professor Mmcann during the Spring '08 term at Saint Joseph's University.

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Cells exam 4 - Cells Exam 4 December 8, 2006 Ver. A NAME_...

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