2023 (QUESTIONS & ANSWERS) FOR Module 4 Exam -
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Due No due date Points 100 Questions 24 Time Limit 60
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LATEST Attempt 1 16 minutes 34 out of 100 *
* Some questions not yet graded
Score for this quiz: 34 out of 100 *
Submitted Dec 28 at 4:41pm
This attempt took 16 minutes.
Correct!
True or False: Differential media is best suited for distinguishing between two
similar species of bacteria.
True
Question 1 2 / 2 pts
Correct!
Selective media
Differential media
Growth media
Non-selective and non-differential media
A researcher is asked to determine which of two vials contains E coli and which
contains salmonella. Knowing both are Gram-negative while only one of them is
capable of fermenting lactose, which type of media would be best suited?
Question 2 2 / 2 pts
Question 3 Not yet graded / 10 pts
Growth media does not contain restrictive factors, while selective media is best
used to encourage the growth of one microbe while simultaneously
discouraging the growth of the other. Since two similar species of microbes are
being studied they must be differentiated under similar but just slightly different
conditions (differential media).
False
Correct!
LB agar is the most basic type of agar and like LB media supports the growth of
virtually all microbes without restriction.
False
True
True or False: LB agar is classified as a selective, non-differential media.
Question 4 2 / 2 pts
What are the requirements of a fastidious microbe?
Your Answer:
reg. growth complex. grown in enriched like media i think. it has a particular/
specific like nutrients for microbes like pH and temp. needs tobe specific. if not
the microbe wont grow at all.
A fastidious microbe is an organism with complex growth
requirements such that if absent it will not grow. Enriched medias
thus contain these specific and essential nutrients required for the
growth of a particular subset of microorganisms.
Correct!
Seaweed (algae) extract.
Your Answer:
seaweed extract i think?
The polysaccharide-based hardening agent added to LB media to produce LB
agar is derived from what?
Question 5 Not yet graded / 5 pts
Blood agar is which type of medium? Select all that apply.
Selective
Differential
Blood agar can be used to differential between species based on its hemolytic
activity. [Show Less]