QUESTION 1
Would one be concerned to find bacteria on the skin? Select all
that apply.
a.
No need for concern because bacteria are everywhere.
b.
Not if there is no rash or obvious infection.
c.
Yes, it's most likely an infection.
d.
If there is a rash of any type, and symptoms suggesting an
infection, further analysis is needed.
e.
Just the presence of bacteria on the skin is no cause for
alarm.
QUESTION 18
Compared to eukaryotic microorganisms, prokaryotes
________________ (select all that apply)
a.
Have their genetic material floating in the cytoplasm.
b.
Have no nucleus.
c.
Have smaller ribosomes.
d.
Show differences in their motility appendages.
e.
None of these are correct.
QUESTION 15
A disinfectant is used on your workbench in the lab. Select all
that apply.
a.
Before the beginning of a procedure.
b.
After all work is completed.
c.
Because the flame is used. No disinfectants are needed.
d.
Right after the step where a plate of bacteria is opened.
QUESTION 21
A student needed to transfer bacteria from a broth culture to an
agar plate. Below is the step-by-step process of what was done to accomplish
this. The transfer of bacteria was not successful because of which
step?
1. Cap of the broth culture is removed.
2. The mouth of the bottle is flamed.
3. The loop was flamed.
4. The loop was inserted into the culture to pick up the
bacteria.
5. The loop was flamed.
6. The loop containing the bacteria was used to introduce and spread the agar plate.
7. The plate was placed in an incubator at 30 Celsius.
a.
1
b.
2
c.
3
d.
4
e.
5
f.
6
g.
7
QUESTION 23
Obtaining a pure culture (select all that apply)
requires isolating a single colony.
might require diluting the sample if the cell number is too
high.
liquid media only.
none of these.
QUESTION 30
Select the statements below for selective media.
A selective media is used when we want certain species/strains
of bacteria to grow in the culture and not the others.
Certain chemicals or drugs that prevent the growth of some
bacteria can be used to make selective media.
Nutritional requirements can be exploited to make a selective
media.
A selective media can be used to identify a bacteria and
therefore can be considered as a diagnostic test.
A selective media is generally a poor media based on the
nutritional content.
All of the above are correct.