Microbiology & Bacterial Cultivation MODULE 4 Exam: Growth Media (LB,
TSA, Blood, Columbia CNA, Chocolate, MacConkey, SMAC, EMB, MSA),
Selective & Differential Media, Enriched & Non-Selective Media, Hemolysis
(Alpha, Beta, Gamma), Fastidious Microbes, Agar Properties, Petri Dish
Colony Formation, Quadrant & Phase Dilution Streaking, Dilution
Gradients, Incubation Temperature Effects, Gram-Negative vs Gram-
Positive Identification, Lactose & Sorbitol Fermentation, Colony
Morphology, Universal Precautions, Plating Techniques, Bacterial Isolation,
Microbial Growth Phases, Fastidious Growth Requirements, Visualization &
Differentiation, Pathogenic Microbe Control, Selective Suppression, Non-
Selective Expansion, Microbial Identification Strategies, Metallic Green
EMB Indicator, Mannitol Fermentation, MacConkey Red Indicator Exam
Questions Verified and Provided with Complete A+ Graded Rationales
Latest Updated 2026
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
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:
, B. Differential media distinguishes between two, often related, microbes.
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.
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
What is agar used for in microbiology?
Agar is used to create a solid, smooth surface on which microbes can grow.
Match the following hemolytic class with its description of activity.
A. No hemolytic activity
B. Incomplete hemolytic
C. Complete hemolytic activity
1. Alpha hemolysis B
2. Beta hemolysis C
3. Gamma hemolysis A
TSA, Blood, Columbia CNA, Chocolate, MacConkey, SMAC, EMB, MSA),
Selective & Differential Media, Enriched & Non-Selective Media, Hemolysis
(Alpha, Beta, Gamma), Fastidious Microbes, Agar Properties, Petri Dish
Colony Formation, Quadrant & Phase Dilution Streaking, Dilution
Gradients, Incubation Temperature Effects, Gram-Negative vs Gram-
Positive Identification, Lactose & Sorbitol Fermentation, Colony
Morphology, Universal Precautions, Plating Techniques, Bacterial Isolation,
Microbial Growth Phases, Fastidious Growth Requirements, Visualization &
Differentiation, Pathogenic Microbe Control, Selective Suppression, Non-
Selective Expansion, Microbial Identification Strategies, Metallic Green
EMB Indicator, Mannitol Fermentation, MacConkey Red Indicator Exam
Questions Verified and Provided with Complete A+ Graded Rationales
Latest Updated 2026
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
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:
, B. Differential media distinguishes between two, often related, microbes.
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.
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
What is agar used for in microbiology?
Agar is used to create a solid, smooth surface on which microbes can grow.
Match the following hemolytic class with its description of activity.
A. No hemolytic activity
B. Incomplete hemolytic
C. Complete hemolytic activity
1. Alpha hemolysis B
2. Beta hemolysis C
3. Gamma hemolysis A
