24-9 Biol reading-Bacterial and Eukaryotic Cell Growth
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64 Terms
procaryotes genetic material
circular chromosome with lots of loops
procaryotes genetic material contained in
nucleoid
prokaryotes have cell wall outside
cell membrane
prokaryotes size
small
prokaryotes translation and transcription
occur simultaneously
eukaryotes nucleus contains
most of DNA
eukaryotes DNA is in
linear chromosomes
eukaryotes transcription
In nucleus
eukaryotes translation
in cytoplasm
cells need 5
nutrients
water
appropriate temp + pH
appropriate gases/oxygen
other environmental conditions
nutrient media
source of materials cells need to grow+ divide
what cells take top from nutrient media
water
ions/minerals
sugars + carbs
amino acids
nucleotides / their precursors
vitamins and other small organic molecules
cell growth
increase in size
produce cellular components
replicates DNA
divides
cell population
number of cells increase
cell population depends on
cell division and survival
population growth phases 6
lag phase
acceleration phase
log phase
decelaration phase
stationary phase
death phase
lag phase
cells adjust to new env
acceleration phase
division rate increases
log phase
cells divide at rapid/ constant rate
decelaration phase
growth rate slows as conditions become limited
stationary phase
new cellsā cells dying
death phase
cell death exceeds cell production
abundant nutrients
cells can synthesize cellular components
DNA replication can proceed
cells divide rapidly
limited nutrients
cells alter gene expression
transcription and translation change
grown and division slow
cells may enter stationary phase
condition become sufficiently unfavourable
cells survival decreases
death phase