BIOD 171: MODULE 4 QUESTIONS
WITH VERIFIED ANSWERS 100%
COMPLETE SOLUTION 2025
, T/F: Growth media is best suited for distinguishing between two similar species of
bacteria - ANSWERFalse
growth media is designed to simply support (and not restrict) microbial growth
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? -
ANSWERDifferential media
What are the requirements of a fastidious microbe? - ANSWERA fastidious microbe is
an organism with complex growth requirements and will not grow without then. Enriched
medias thus contain these specific and essential nutrients required for the growth of a
particular subset of microorganisms.
T/F: LB agar is classified as a non-selective, non-differential media - ANSWERTrue
The polysaccharide-based hardening agent added to LB media to produce LB agar is
derived from what? - ANSWERSeaweed extract
Blood agar is which type of medium? Select all that apply:
- Selective and Differential
- Enriched
- Differential
- Selective - ANSWER- Enriched
- Differential
Match the following hemolytic class with its description of activity:
1. Alpha hemolysis
2. Beta hemolysis
3. Gamma hemolysis
A. No change
B. Greenish-brown color
C. Distinct zone of clearing - ANSWER1. Alpha hemolysis- Greenish-brown color (B)
2. Beta hemolysis- Distinct zone of clearing (C)
3. Gamma hemolysis- No change (A)
Match the following hemolytic class with its description of activity:
WITH VERIFIED ANSWERS 100%
COMPLETE SOLUTION 2025
, T/F: Growth media is best suited for distinguishing between two similar species of
bacteria - ANSWERFalse
growth media is designed to simply support (and not restrict) microbial growth
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? -
ANSWERDifferential media
What are the requirements of a fastidious microbe? - ANSWERA fastidious microbe is
an organism with complex growth requirements and will not grow without then. Enriched
medias thus contain these specific and essential nutrients required for the growth of a
particular subset of microorganisms.
T/F: LB agar is classified as a non-selective, non-differential media - ANSWERTrue
The polysaccharide-based hardening agent added to LB media to produce LB agar is
derived from what? - ANSWERSeaweed extract
Blood agar is which type of medium? Select all that apply:
- Selective and Differential
- Enriched
- Differential
- Selective - ANSWER- Enriched
- Differential
Match the following hemolytic class with its description of activity:
1. Alpha hemolysis
2. Beta hemolysis
3. Gamma hemolysis
A. No change
B. Greenish-brown color
C. Distinct zone of clearing - ANSWER1. Alpha hemolysis- Greenish-brown color (B)
2. Beta hemolysis- Distinct zone of clearing (C)
3. Gamma hemolysis- No change (A)
Match the following hemolytic class with its description of activity:
