Lab exam 1
Where would you expect to find a saprophyte organism?
In soil
Which of the following things below would result in a pure culture?
A completely isolated colony growing on a plate
Microorganims are ubiquitous. This means they would be found in which of the
following places?
Soil
The body
On an aluminum railing
Some bacteria can lyse (break down) red blood cells in a process called hemolysis.
Match the following descriptions of hemolysis with the correct outcome on a blood
agar plate:
α hemolysis
There will be a greenish colored zone around the bacterial growth due to incomplete
lysis of the red blood cells
Some bacteria can lyse (break down) red blood cells in a process called hemolysis.
Match the following descriptions of hemolysis with the correct outcome on a blood
agar plate:
β hemolysis
The blood agar plate will show clear around the bacterial growth due to complete
hemolysis of the red blood cells
Some bacteria can lyse (break down) red blood cells in a process called hemolysis.
Match the following descriptions of hemolysis with the correct outcome on a blood
agar plate:
ϒ hemolysis
the blood agar plate will show no hemolysis
Which of the following things is a safe practice when transferring cultures?
Hold the inoculating loop like a pencil
The handles of inoculating loops can get very hot. How hot can your inoculating
loop get if you leave it in the incinerator for a really long time?
close to 800*
When a cap is removed from a tube in the transfer process, where does that cap
go?
