Micro 2 Review Questions

Micro 2 Review Questions - Term Definition Inorganic...

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Term: Inorganic electronic acceptors such as Nitrate or ......... can be used by bacteria during anaerobic respiration Definition: Sulfate Term: Many chemolithotrophic bacteria use hydrogen sulfide to produce their ............ Definition: ATP (energy) Term: During .................. , the end product if a pathway builds up and blocks an enzyme at the beginning of the biosynthetic pathway. Definition: Feedback inhibition Term: Bacteria that can grow in the presence of oxygen but only ferments are called ................. Definition: facultative aerobes Term: The highest temperature where an extreme thermophilic bacteria has been found to survive is ............... C. Definition: 95 degrees
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Term: FST proteins come together to form the .............. which then form the septum b/w dividing bacteria. Definition: Dinsome Term: In the lab, E. coli can divide every ...... mins. Definition: 20 Term: Secondary metabolites are formed during the .......... phase of the bacterial growth curve. Definition: Stationary Term: Direct microscopic counts are typically performed using the ............. counting chambers. Definition: Petroff-Hauser Term: To estimate bacterial numbers we count ................ forming units produced by a plate count Definition: Colony
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Term: During the ................ plate procedure, diluted bacteria are suspended in melted agar which is then placed in a plate, incubated and counted Definition: pour Term: At the ........ growth temperature, bacteria stop reproducing but are still alive Definition: minimum Term: To counteract acid production, many bacteriological media contain ............. Definition: buffers Term: A(n) ............. is a mesophile that is able to grow at cold temps. Definition: psychrotolerant Term: The decimal .......... time is the time needed to cause a tenfold decrease in bacteria in the test substrate. Definition: reduction
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Term: Autoclaves require a temp. of ........... C for 15 mins. to sterilize media. Definition: 121 Term: Flash pasteurization requires ........ C for .......... seconds Definition: 71 degrees for 15 seconds Term: ................. are the most heat resistant life forms produced by bacteria. Definition: Endospores Term: HEPA filters stand for high efficiency ........... air filters Definition: Particulate Term: Gamma radiation is used to sterilize food instead of UV light b/c it has better ability to ........ the food Definition: penetrate
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Term: .............. is a gas commonly used to cold sterilize heat sensitive materials such as plasics. Definition: Ethylene oxide Term: Slavarsan, discovered by ................ , was considered to be the 1st effective antimicrobial agent. Definition: Paul Ehlrich Term: .............. is a new antibiotic that specifically targets bacterial fatty acid synthesis. Definition: Platensinycin Term: ........... drugs work by blocking the synthesis of folic acid Definition: sulfa Term: Tamiflu and Relenza both work by attacking the part of the flu virus called .............. Definition: neuramidase
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Term: Almost all bacterial chromosomes are shaped as .............. Definition: Circular Term: .......... repeats can lead to the formation of stem loops.
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