prokaryotic cell division Flashcards
binary fission
one cell divides to become two cells
Osmotic pressure
the pressure that is exerted on a cell membrane by solutions both inside and outside the cell
Osmosis
the movement of a solvent, through a semi-permeable membrane, from a lower concentration of solutes (dissolved substances) to a higher concentration of solutes
Hypotonic
Pressure forces water into the cell
Isotonic
equal pressure; no net movement of water
Hypertonic
Pressure forces water out of the cell
stages of prokaryotic cell division
1) DNA Replication
2) Cell Elongation
3) Septum formation
4) Cell separation
During cell separation each daughter cell…
receives one copy of the chromosome
Lag phase
bacteria are preparing to divide
Log phase
Most active bacterial division
Stationary phase
Division slows. # of deaths = # of new cells generated
Death phase
culture nutrients are depleted and the number of deaths is greater than the new cells generated
prokaryotic cell division takes about ____ minutes in many species
20
