Measuring Growth
This is another name for total cell count
Direct count
The suffix meaning "to eat"
What is "troph" ?
Passive diffusion does not require this
What is energy?
The time required for the number of cells to double
What is generation time?
Why haven't bacteria grown to cover the whole Earth?
Something limits their growth
This is another name for viable count
Plate/colony count
Carbon source is CO2
What is an autotroph?
Facilitated diffusion uses this type of diffusion
Passive
In the generation time equation, Nf means this
What is final cell number?
The period after inoculation of a culture when growth begins is known as this
Lag phase
When comparing direct count and viable count, far fewer cells would be found on this count
Viable count
Carbon source is organic molecules
What is heterotroph?
Active diffusion utilizes this
What is energy?
In the generation time equation, Ni means this
Initial number of cells
The period in which cells die off
Death phase
This is the name for measuring the cloudiness of a suspension
Turbidity
Energy source is light
What is a phototroph?
This type of active transport alters molecules as they are transported
Group transport
In the generation time equation (see below), 2^n means this
Nf=(Ni)2^n
The number of generations
The period in which growth ceases
Stationary phase
This is a device for continuous culturing
Chemostat
Energy source is INORGANIC chemicals
What is a chemolithotroph?
Since prokaryotes don't have mouths and most have an inflexible cell wall, they generally ingest their food using this
Exoenzymes
If we start with 200 cells of an organism with g=1 hour and we let it grow for 4 hours, this is the number of cells we will have
Nf=(Ni)2^n
3,200
This is used to visualize the growth of bacteria
The Bacterial Growth Curve