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exam 3 bio 208 fall 06

exam 3 bio 208 fall 06 - BIO 208 001/201 Fall 2006...

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BIO 208 – 001/201 / Fall 2006 / Examination 3 Cell phones: All cell phones MUST be turned off and put away during an examination period. They must not be turned back on again until after exiting the examination room. USE OF A CELLPHONE (this includes receiving calls) DURING AN EXAMINATION PERIOD IS EVIDENCE OF CHEATING AND WILL BE TREATED AS SUCH. In addition to the circumstance listed above, the following activities are considered evidence of cheating: 1) Any talking to another student during an examination. 2) Looking at another students work during an examination, or allowing another student to look at your work. MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1. All of the following are important elements required in abundant quantities for microbial growth EXCEPT __________. a. carbon b. nitrogen c. hydrogen d. electrons e. sodium 2. A certain bacteria that obtains its energy from the oxidation of ammonium and uses carbon dioxide as its carbon source would best be described as a / an __________. 3. If all the nitrogen-containing ingredients were omitted from a chemically defined medium, one would predict that the bacteria would be unable to produce which of the following? 4. Deoxycholate agar permits only Gram-negative intestinal bacteria to grow. Of these bacteria, those species that ferment lactose produce red colonies and those that do not ferment lactose produce colorless colonies. In view of this information, deoxycholate agar is what kind of medium? 5. Which of the following is not a reason for the occurrence of a lag phase in a bacterial growth curve? a. the cells may be old and depleted of ATP, essential cofactors, and ribosomes that must be synthesized before growth can occur b. the medium may be different from the previous growth medium so that the cells must synthesize new enzymes to utilize different nutrients c. all of these are reasons for a lag phase d. none of these are reasons for a lag phase 6. What is a difference between stationary phase and death phase?
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