Portage Microbiology Lab Exam 3 Questions
and Answers with Verified Solutions | Latest
Updated 2026
List the four main steps used to 1 - Clean slide2 - Circle area on slide for
prepare a DRY mount, and specimen
indicate placement (OPTIONAL)3 - Apply organism
which step is optional. to
slide4 - Air dry at room temperature
Why is it important to first clean You must first remove any unwanted
your contaminants
slide before applying your sample? from the slide otherwise it may be difficult
to
distinguish between the pathogen of
interest and a
contaminant.
You wish to study the motility of a A wet mount technique is the best
particular bacterium. What type of technique to use
mounting technique would you when studying motility of an organism
use? because the
Explain your answer. sample remains viable (heat fixing kills the
sample).
What dye do Gram-positive crystal violet
bacteria
primarily retain?
and Answers with Verified Solutions | Latest
Updated 2026
List the four main steps used to 1 - Clean slide2 - Circle area on slide for
prepare a DRY mount, and specimen
indicate placement (OPTIONAL)3 - Apply organism
which step is optional. to
slide4 - Air dry at room temperature
Why is it important to first clean You must first remove any unwanted
your contaminants
slide before applying your sample? from the slide otherwise it may be difficult
to
distinguish between the pathogen of
interest and a
contaminant.
You wish to study the motility of a A wet mount technique is the best
particular bacterium. What type of technique to use
mounting technique would you when studying motility of an organism
use? because the
Explain your answer. sample remains viable (heat fixing kills the
sample).
What dye do Gram-positive crystal violet
bacteria
primarily retain?
