MICR221 Exam Questions With Correct
Answers
What type of aerobe needs 2-10% oxygen - answermicroaerobe
what can bacteria use as sustained energy generation as well as ATP source -
answerfermentation pathway
relationship between persistence and resistence - answerafter anti biotic kill exponent...
What type of aerobe needs 2-10% oxygen - answer✔✔microaerobe
what can bacteria use as sustained energy generation as well as ATP source -
answer✔✔fermentation pathway
relationship between persistence and resistence - answer✔✔after anti biotic kill exponential
numbers of bacteria, any bacteria that survived is persistent and can mutate to become
geentically resistant
what effect does hypoxia have on bacteria - answer✔✔depletion of oxygen leads it to the
stationary phase which causes slower growth of the cells
what are the basic requirements of a cell - answer✔✔energy, precursor metabolites, reducing
power
how many precursor metabolites does e. coli use - answer✔✔12
Define amphipathic - answer✔✔A molecule that has both a hydrophilic region and a
hydrophobic region.
what is b helices specialized purpose - answer✔✔to create the porins in G- bacteria
what transport system/family allows for movement of smaller molecules - answer✔✔Major
facilitator superfamily (MFS)
what transport system traps substrate through the movement of phosphate through a cascade
complex - answer✔✔phosphotransferase
what transport family uses ATP to move substrate in and out of the cell - answer✔✔ATP binding
casette family
why can bacteria that passively diffuse out compete bacteria that actively diffuse in certain
environements - answer✔✔while active bacteria have to split ATP into growing and consuming
nutrients, bacteria that diffuse can just put all there ATP toward growing
which machinery is nessacery in every cell: cell wall, collagen, a concentration gradient -
answer✔✔a PMF/concentration gradient
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