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MicroLec_Midterm_1_S2011_aKEY - Microbiology Exam I...

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Microbiology Exam I February 22, 2011 Name (Print): ____________________ READ AND SIGN THE FOLLOWING PARAGRAPH BEFORE BEGINNING THE EXAM. Your exam will not be graded unless you’ve signed the statement. I pledge that I will neither seek help nor offer help to any other student while taking this exam. I will make every effort to assure that no other student can see my answers. I also state that I have no aids, such as crib sheets and that I know of none used by other students. I have not conferred with any student who has already seen the exam. Signed:_____________________________________ INSTRUCTIONS: *No electronic devices of any kind are allowed during the exam. Turn your cell phone OFF and put away any electronic device you have (calculator, iPod, laptop, fuel injector, etc). * Print and bubble in your name: Last name, space, first name . * Bubble in your campus ID number (on your ID card) * If you have a question about a question, please ASK. * At the end of the exam, turn in both the scantron sheet and this exam. The exam will be returned to you later. 1. Who insisted that his physicians wash their hands after examining each patient? A. Semmelweis B. Ehrlich C. Lindahl D. vanLeeuwenhoek E. Lister 2. Escherichia coli is about 2 μ m in length. How many of these cells would comprise a chain 1 mm long? A. 5 X 10 6 B. 5 X 10 5 C. 5000 D. 500 E. 50
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2 3. The life expectancy of humans in the USA was about 47 years in the year 1900. In the year 2000 it was about 75 years. Which of the following contributed to the dramatic change? 4. Which of the following are eukaryotes? 5. A disease occurred in some of the wildebeests in the UMBC wildlife preserve. A graduate student examined the diseased wildebeests. She isolated a bacterium that was found in all of the diseased wildebeests but none of the healthy ones. She inoculates the bacterium into healthy wildebeests and they contract the disease. Has she demonstrated that this bacterium is the infective agent?
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