BIOD171 / BIOD 171 Final Exam (Latest Update 2025 / 2026) Essential Microbiology with Lab | Questions & Answers | Grade A | 100% Correct - Portage Learning

BIOD171 / BIOD 171 Final Exam
(Latest Update )
Essential Microbiology with Lab |
Questions & Answers | Grade A |
100% Correct - Portage Learning


Question:
True or False: A Giemsa stain can be used to determine the presence of
pathogenic bacteria.
Answer:
True




Question:
True or False. The purpose of a quadrant streak is to produce individual
colonies of bacterial population.
Answer:
True

,Question:
When performing a quadrant streak, the sample is spread across the plate in
such a way to form what?
Answer:
A dilution gradient.




Question:
A dilution gradient is formed when carrying out what generalize plating
strategy?
Answer:
Phase-Dilution streak




Question:
In what phase of dilution streak would you expect to find the lowest
concentration of bacteria. P2 or P4?
Answer:
P4.


The phases concentration rank from P1 being the highest, then P2, P3, and
P4.

, Question:
True or False. When performing a dilution streak a new (or sterilized) loop is
not required for each phase as long as the bacterial culture is pure.
Answer:
False




Question:
The number of phases (3 vs. 4) and/or the number of times a loop passes
through a previous phase (once vs. multiple) is acceptable provided what
happens?
Answer:
The resulting gradient has growth of the individual colonies in it




Question:
True or False. To restrict the growth of a pathogenic microbe a researcher
might decrease an incubator from 37°C to 25°C.
Answer:
True