Midterm Exam: SCI 251 / SCI251
(Latest ) Microbiology |
Questions & Answers 100% Correct -
Nightingale
Question:
Sterilization
Answer:
Absolute destruction of all viable microbial life, including endospores and
prions.
Question:
Disinfection
Answer:
Destruction of vegetative pathogens on inanimate objects; does not reliably
kill endospores.
,Question:
Sanitization
Answer:
Lowering microbial counts on eating utensils to safe public health levels.
Question:
Degermination
Answer:
Mechanical removal of microbes from a limited area of living skin.
Question:
Pasteurization
Answer:
Brief, mild heat treatment killing pathogens/spoilage organisms without
degrading food quality.
Question:
Microbial Resistance Hierarchy
Answer:
Most to least: Prions > Endospores > Mycobacteria > Protozoan Cysts.
, Question:
Dry Heat Sterilization Parameters
Answer:
Requires high temperatures of 160°C to 170°C for 2 to 4 hours.
Question:
Autoclaving (Moist Heat)
Answer:
Uses steam under pressure (121°C at 15 psi); rapidly denatures proteins.
Question:
Enriched Media
Answer:
Fortified with specialized nutrients (e.g. blood) to promote fastidious
pathogen growth.
Question:
Selective Media
Answer:
Inhibits growth of one microbial group while actively promoting another.
(Latest ) Microbiology |
Questions & Answers 100% Correct -
Nightingale
Question:
Sterilization
Answer:
Absolute destruction of all viable microbial life, including endospores and
prions.
Question:
Disinfection
Answer:
Destruction of vegetative pathogens on inanimate objects; does not reliably
kill endospores.
,Question:
Sanitization
Answer:
Lowering microbial counts on eating utensils to safe public health levels.
Question:
Degermination
Answer:
Mechanical removal of microbes from a limited area of living skin.
Question:
Pasteurization
Answer:
Brief, mild heat treatment killing pathogens/spoilage organisms without
degrading food quality.
Question:
Microbial Resistance Hierarchy
Answer:
Most to least: Prions > Endospores > Mycobacteria > Protozoan Cysts.
, Question:
Dry Heat Sterilization Parameters
Answer:
Requires high temperatures of 160°C to 170°C for 2 to 4 hours.
Question:
Autoclaving (Moist Heat)
Answer:
Uses steam under pressure (121°C at 15 psi); rapidly denatures proteins.
Question:
Enriched Media
Answer:
Fortified with specialized nutrients (e.g. blood) to promote fastidious
pathogen growth.
Question:
Selective Media
Answer:
Inhibits growth of one microbial group while actively promoting another.
