Test3-2008answers - BIO-320 Name _ Cell Biology Spring 2008...

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BIO-320 Name _____________________________________ Cell Biology – Spring 2008 --------------------------------------------------------------------------------------------------------------------- PERSONAL EID __________________ Multiple choice________ Written portion________ TOTAL SCORE ________ Page 1 of 10 THIRD MIDTERM EXAM (05/01/2008) Before you do anything else, please: Check to make certain that your copy of the exam is complete, i.e. pages 1 - 10. Print your name legibly in the space provided at the top of each page, and also on the scantron bubble sheet. BE SURE TO FILL IN YOUR EID IN THE CORRESPONDING SPACES IN THE SHEET AND ON THIS PAGE. Total possible points = 100 points. The essays MUST be written in pen. If you use a pencil you cannot request a regrade. MULTIPLE CHOICE [2.5 points/question] Choose the best answer for the 30 multiple-choice questions by marking the appropriate letter under the same number on your scantron bubble sheet. USE A # 2 PENCIL. 1) Eukaryotes can accomplish DNA replication in a short amount of time by: a) Having small chromosomes that can be replicated quickly. b) Having multiple origins of replication per chromosome. c) Encoding a fast polymerase. d) Having a very efficient proofreading activity. e) Having a high amount of telomerase activity. 2) The disassembly of the nuclear envelope… a) involves the separation of the inner nuclear membrane from the outer nuclear membrane. b) results in the separation of the nuclear envelope lipids from nuclear envelope proteins. c) is triggered by the phosphorylation of integrins. d) occurs at the end of prophase. e) must occur in order for overlap spindle microtubules to form in animal cells. 3) Consider an animal cell that has eight chromosomes (four pairs of homologous chromosomes) in G1 phase. How many sister chromatids, centrosomes and centrioles will this cell have when it enters mitosis? a) 8 sister chromatids, 8 centrosomes and 2 centrioles b) 16 sister chromatids, 2 centrosomes and 2 centrioles c) 16 sister chromatids, 4 centrosomes and 4 centrioles d) 8 sister chromatids, 2 centrosomes and 2 centrioles e) 16 sister chromatids, 2 centrosomes and 4 centrioles 4) Which of the following events occurs at the beginning of Prophase? a) Degradation of M-cyclin. b) Ubiquitination of G1/S-cyclin. c) Phosphorylation of Condensins. d) Dephosphorylation of Cohesins. e) Assembly of the nuclear envelope.
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BIO-320 Cell Biology – Spring 2008 Name _____________________________________ Page 2 of 10 5) Which of the following statements about kinetochores is TRUE? a) A kinetochore often binds to more than one microtubule. b) Kinetochores contain DNA-binding proteins that recognize sequences at the telomere of the chromosome. c)
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Test3-2008answers - BIO-320 Name _ Cell Biology Spring 2008...

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