exam1 - Biology 207 Introductory Microbiology, Exam #1, 27...

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Biology 207 Introductory Microbiology, Exam #1, 27 September 2006 Name_____________________________________ UMID number________________________ FORM: 1 (one, yellow) Mark on scantron. GSI and Lab section (day and time) ___________________ Multiple choice. Circle the letter of the one correct answer and mark your scantron sheet. (4 points each) 1. Catabolism differs from anabolism in which one of the following ways? a. catabolism and anabolism are linked aspects of metabolism that describe the mechanisms by which cells synthesize ATP b. anabolism produces energy and precursor metabolites that are consumed to power catabolism c. anabolism uses energy and precursor metabolites, generated during catabolism, to synthesize biomolecules d. catabolism is a building up of cellular constituents which releases reducing power for anabolic synthesis of ATP e. anabolism is carried out by one type of cell, which donates the energy to other types of cells for catabolism 2. Which statement best explains why bacteria growing in batch culture enter stationary phase? a. following growth, a period of metabolic rest allows cells to replenish pools of precursors and complete the replication and division of the chromosome b. bacterial cultures with a high concentration of cells produce chemical signals that stop the reproduction of neighboring cells c. at high cell concentrations, DNA replication ceases due to a limitation in the number of ribosomes d. after a time of rapid growth, cells rest to consume less energy and survive longer (i.e., stationary phase) e. during growth of a bacterial culture, nutrients are consumed and waste products are released and build up 3. Which one of the following correctly describes anaerobic respiration? a. utilization of reduced compounds, such as hydrogen sulfide or H 2 O, as terminal electron acceptors under anaerobic conditions b. the ability of bacteria to use oxygen as a terminal electron acceptor at low concentrations of oxygen c. utilization of compounds other than oxygen as terminal electron acceptors under anaerobic conditions d. the ability of certain bacteria to generate different waste products when growing on glucose under anaerobic and microaerophilic conditions e. internally-balanced redox reactions using organic compounds under anaerobic conditions 4. Which one of the following is NOT a hallmark of cellular life? a. descent without modification b. sensory capability c. separation of function d. growth and division e. acquisition of energy and nutrients from the environment 5. What theory did aseptic technique help to disprove? a. the theory of evolution, i.e., descent with modification b. the theory that living organisms arise spontaneously from inert organic material c. the theory that cells are the fundamental unit of all living organisms d. the theory that life on Earth arose from extraterrestrial sources e. the theory that chemical ferments result from the gradual heating of biologically inert materials
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207 Exam #1, page 2 of 5 6. Which one of the following is thought most likely to be responsible for the theoretical upper temperature limit, 150ºC, for microbial life?
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exam1 - Biology 207 Introductory Microbiology, Exam #1, 27...

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