Ch 5 - Microbial Growth Flashcards
(39 cards)
cell division following enlargement of a cell to twice its minimum size
Binary fission
forms ring around center of cell
ftsZ
major shape-determining factor in prokaryotes
mreB
Forms simple cytoskeleton in Bacteria and probably Archaea
mreB
Localizes synthesis of new peptidoglycan and other cell wall components to specific locations along the cylinder of a rod-shaped cell during growth
mreB
in _____, cell walls grow in opposite directions outward from the FtsZ ring
Cocci
in _________, growth occurs at several points along length of the cell
rod-shaped cells
where two daughter cells begin to separate
septum
these are the most important proteins in cell division
FTS Proteins (ftsZ, in particular)
small openings in the wall are created by _______.
autolysins
junction between new and old peptidoglycan
wall band
next to last step in cell wall synthesis
Transglycosylation
final step in cell wall synthesis
Transpeptidation
Forms the carbohydrate cross-links
transglycosylation
Forms the peptide cross-links between muramic acid residues in adjacent glycan chains
transpeptidation
time required for microbial cells to double in number
generation time
growth of a microbial population in which cell numbers double within a specific time interval
exponential growth
a closed-system microbial culture of fixed volume
batch culture
an open-system microbial culture of fixed volume
continuous culture
most common type of continuous culture device
chemostat
in ______ culture, it is impossible to independently control both growth parameters
batch
uses laser beams, fluorescent dyes, and electronics to measure # of live and dead cells
flow cytometry
the (higher/lower) the Opitical Density in a spectrophotometer reading, the more bacterial growth
higher
the minimum, optimum, and maximum temperatures at which an organism grows
cardinal temperatures
