BIOD 171 ESSENTIAL MICROBIOLOGY PORTAGE
LEARNING MODULE M4 MODULE 4 EXAM 50 QUESTIONS
AND ANSWERS UPDATED 2026 VERIFIED ANSWERS
ACTUAL UPDATED PRACTICE QUESTIONS HIGH YIELD
STUDY GUIDE GRADED A+
T/F: Growth media is best suited for distinguishing between two similar species
of bacteria - CORRECT ANSWER -False
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? -
CORRECT ANSWER -Differential media
What are the requirements of a fastidious microbe? - CORRECT ANSWER
-A 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 -
CORRECT ANSWER -True
The polysaccharide-based hardening agent added to LB media to produce LB
agar is derived from what? - CORRECT ANSWER -Seaweed extract
Blood agar is which type of medium? Select all that apply:
- Selective and Differential
, - Enriched
- Differential
- Selective - CORRECT 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 - CORRECT ANSWER -1. 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:
1. Alpha hemolysis
2. Beta hemolysis
3. Gamma hemolysis
A. No hemolytic activity
B. Incomplete hemolytic activity
C. Complete hemolytic activity - CORRECT ANSWER -1. Alpha
hemolysis- Incomplete hemolytic activity (B)
2. Beta hemolysis- Complete hemolytic activity (C)
LEARNING MODULE M4 MODULE 4 EXAM 50 QUESTIONS
AND ANSWERS UPDATED 2026 VERIFIED ANSWERS
ACTUAL UPDATED PRACTICE QUESTIONS HIGH YIELD
STUDY GUIDE GRADED A+
T/F: Growth media is best suited for distinguishing between two similar species
of bacteria - CORRECT ANSWER -False
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? -
CORRECT ANSWER -Differential media
What are the requirements of a fastidious microbe? - CORRECT ANSWER
-A 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 -
CORRECT ANSWER -True
The polysaccharide-based hardening agent added to LB media to produce LB
agar is derived from what? - CORRECT ANSWER -Seaweed extract
Blood agar is which type of medium? Select all that apply:
- Selective and Differential
, - Enriched
- Differential
- Selective - CORRECT 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 - CORRECT ANSWER -1. 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:
1. Alpha hemolysis
2. Beta hemolysis
3. Gamma hemolysis
A. No hemolytic activity
B. Incomplete hemolytic activity
C. Complete hemolytic activity - CORRECT ANSWER -1. Alpha
hemolysis- Incomplete hemolytic activity (B)
2. Beta hemolysis- Complete hemolytic activity (C)
