BIOD 171
M4: Module 4 Exam - Requires
Respondus LockDown Browser +
Webcam
Question 1
pts
True or False:Differentialmediais bestsuitedfor distinguishing
betweentwo similar
speciesof bacteria.
Correct!
True
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
Question 2
pts
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?
Selective and Differential media
Selective media
Growth media
Correct!
Differential media
Differential media distinguishes between two, often related, microbes.
, BIOD 171
Question 3
Not yet graded / 10 pts
What are the requirements of a fastidious microbe?
Your Answer:
A fastidious microbe requires enriched media which contains specific and
essential nutrients for the growth of a specific subgroup of microorganisms.
Fastidious microbes have complex growth requirements and without the
enriched media they will not grow.
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.
Question 4
pts
True or False:LB agaris classifiedas a non-selective,
non-differential
media.
Correct!
True
LB agar is the most basic type of agar and like LB media supports the growth of
virtually all microbes without restriction.
False
Question 5
Not yet graded / 5 pts
The polysaccharide-based hardening agent added to LB media to produce LB
agar is derived from what?
Your Answer:
seaweed (algae)
Seaweed (algae) extract.
M4: Module 4 Exam - Requires
Respondus LockDown Browser +
Webcam
Question 1
pts
True or False:Differentialmediais bestsuitedfor distinguishing
betweentwo similar
speciesof bacteria.
Correct!
True
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
Question 2
pts
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?
Selective and Differential media
Selective media
Growth media
Correct!
Differential media
Differential media distinguishes between two, often related, microbes.
, BIOD 171
Question 3
Not yet graded / 10 pts
What are the requirements of a fastidious microbe?
Your Answer:
A fastidious microbe requires enriched media which contains specific and
essential nutrients for the growth of a specific subgroup of microorganisms.
Fastidious microbes have complex growth requirements and without the
enriched media they will not grow.
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.
Question 4
pts
True or False:LB agaris classifiedas a non-selective,
non-differential
media.
Correct!
True
LB agar is the most basic type of agar and like LB media supports the growth of
virtually all microbes without restriction.
False
Question 5
Not yet graded / 5 pts
The polysaccharide-based hardening agent added to LB media to produce LB
agar is derived from what?
Your Answer:
seaweed (algae)
Seaweed (algae) extract.
