2025/ 2026 Update) Fundamentals of
Microbiology | Qs & As| Grade A| 100%
Quiz_________________?
____________ is not a Eukaryotic Supergroup -
Answer✅
bacteria
Quiz_________________?
____________ produces coagulase, whereas most other species of Staphylococcus do not
produce this enzyme -
Answer✅
S. aureus
Quiz_________________?
____________________ is not a disinfectant -
Answer✅
penicillin
Quiz_________________?
"-cidal" -
Answer✅
a suffix used to identify agents that kill or destroy microorganisms
1
, -For example, bacteriocidal agents kill bacteria, while fungicidal agents kill fungi (yeasts and
molds).
Quiz_________________?
"-static" -
Answer✅
a suffix used to identify agents that do not kill, but only inhibit the growth of
microorganisms
-When the agent is removed, the microorganism may resume growth.
-For example, bacteriostatic agents inhibit the growth of bacteria.
Quiz_________________?
•What makes the MSA plate differential?
•Differential for what? -
Answer✅
•differential agent is mannitol, a sugar alcohol.
•Staphylococcus aureus will ferment the mannitol, but most other Staphylococcus spp will
not.
•Fermentation generates acidic end-products which lower the pH, causing the phenol red
indicator to change from red to yellow.
Quiz_________________?
•What makes the MSA plate selective?
•Selective for what? -
Answer✅
•selective agent is sodium chloride (NaCl) - 7.5% (w/v).
•The high salt concentration will inhibit the growth of most bacteria, but not Staphylococcus
spp.
Quiz_________________?
2
, 1. amoeba -
Answer✅
-no definitive cell shape
-has pseudopods
-family amoebidae
-unicellular
-heterotrophic organism which has the ability to alter its shape
-common in soil and aquatic habitats and many are parasitic for animals, including man (e.g.
brain-eating amoeba)
Quiz_________________?
1. budding yeast -
Answer✅
-saccharomyces cerevisiae
-used in bread baking, fermentation of wine, and fermentation of beer
Quiz_________________?
1. dry heat -
Answer✅
-kills organisms by oxidizing proteins and lipids.
-High temperatures and long heating times are required to heat-sterilize items
-For example, 2 hours at 160°C or 1 hour at 170°C. Because of the high temperatures, heat
sterilization is usually applied to glassware and metal objects
Quiz_________________?
1. heat (3 types) -
Answer✅
1. dry heat
2. moist heat
3
Microbiology | Qs & As| Grade A| 100%
Quiz_________________?
____________ is not a Eukaryotic Supergroup -
Answer✅
bacteria
Quiz_________________?
____________ produces coagulase, whereas most other species of Staphylococcus do not
produce this enzyme -
Answer✅
S. aureus
Quiz_________________?
____________________ is not a disinfectant -
Answer✅
penicillin
Quiz_________________?
"-cidal" -
Answer✅
a suffix used to identify agents that kill or destroy microorganisms
1
, -For example, bacteriocidal agents kill bacteria, while fungicidal agents kill fungi (yeasts and
molds).
Quiz_________________?
"-static" -
Answer✅
a suffix used to identify agents that do not kill, but only inhibit the growth of
microorganisms
-When the agent is removed, the microorganism may resume growth.
-For example, bacteriostatic agents inhibit the growth of bacteria.
Quiz_________________?
•What makes the MSA plate differential?
•Differential for what? -
Answer✅
•differential agent is mannitol, a sugar alcohol.
•Staphylococcus aureus will ferment the mannitol, but most other Staphylococcus spp will
not.
•Fermentation generates acidic end-products which lower the pH, causing the phenol red
indicator to change from red to yellow.
Quiz_________________?
•What makes the MSA plate selective?
•Selective for what? -
Answer✅
•selective agent is sodium chloride (NaCl) - 7.5% (w/v).
•The high salt concentration will inhibit the growth of most bacteria, but not Staphylococcus
spp.
Quiz_________________?
2
, 1. amoeba -
Answer✅
-no definitive cell shape
-has pseudopods
-family amoebidae
-unicellular
-heterotrophic organism which has the ability to alter its shape
-common in soil and aquatic habitats and many are parasitic for animals, including man (e.g.
brain-eating amoeba)
Quiz_________________?
1. budding yeast -
Answer✅
-saccharomyces cerevisiae
-used in bread baking, fermentation of wine, and fermentation of beer
Quiz_________________?
1. dry heat -
Answer✅
-kills organisms by oxidizing proteins and lipids.
-High temperatures and long heating times are required to heat-sterilize items
-For example, 2 hours at 160°C or 1 hour at 170°C. Because of the high temperatures, heat
sterilization is usually applied to glassware and metal objects
Quiz_________________?
1. heat (3 types) -
Answer✅
1. dry heat
2. moist heat
3
