Portage Learning BIOD 171 Module 4
Exam Module 4
1. True or False: Growth media is best suited for distinguishing between two similar species of bacteria.
False. Growth media is designed to simply support (and not restrict) microbial growth.
2. A researcher is asked to determine which of ...
portage learning biod 171 module 4 exam module 4 1 true or false growth media is best suited for distinguishing between two similar species of bacteria false growth media is designed to simply s
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Portage Learning BIOD 171 Module 4
Exam Module 4
1. True or False: Growth media is best suited for distinguishing
between two similar species of bacteria.
False. Growth media is designed to simply support (and not restrict)
microbial growth.
2. 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:
A. Growth media
B. Differential media
C. Selective media
D. Selective and Differential media
B. Differential media distinguishes between two, often related,
microbes.
3. What are the requirements of a fastidious microbe?
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.
4. True or False: LB agar is classified as a selective, non-differential
media.
False. LB agar is the most basic type of agar and like LB media
supports the growth of virtually all microbes without restriction.
5. What is agar used for in microbiology?
Agar is used to create a solid, smooth surface on which microbes
can grow.
6. Match the following hemolytic class with its description of activity.
1. Alpha hemolysis
B A. No hemolytic activity
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