Microbial Control Methods
Biology ⇒ Microorganisms and Microbiology
Microbial Control Methods starts at 10 and continues till grade 12.
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See sample questions for grade 12
Describe how moist heat kills microorganisms.
Describe the difference between disinfection and antisepsis.
Describe the principle behind filtration as a microbial control method.
Describe the principle of action of phenolic compounds as disinfectants.
Explain the difference between bactericidal and bacteriostatic agents.
Explain why endospores are more resistant to heat and chemicals than vegetative cells.
Explain why high concentrations of salt or sugar can preserve food.
A hospital is experiencing an outbreak of a spore-forming bacterium. Which sterilization method should be used for surgical instruments?
(1) Boiling
(2) Autoclaving
(3) UV radiation
(4) Alcohol wipes
A hospital is experiencing an outbreak of a spore-forming bacterium. Which sterilization method should be used for surgical instruments?
(1) Boiling
(2) Autoclaving
(3) UV radiation
(4) Alcohol wipes
Which method is best for sterilizing glassware in a laboratory?
(1) Boiling
(2) Dry heat oven
(3) UV radiation
(4) Filtration
Which of the following is a limitation of using alcohol as a disinfectant?
(1) It evaporates quickly
(2) It is corrosive to metals
(3) It leaves toxic residues
(4) It is not effective against viruses
Which of the following is a limitation of using filtration for sterilization?
(1) It cannot remove viruses
(2) It is not suitable for heat-sensitive liquids
(3) It cannot remove bacteria
(4) It is expensive
The lowest temperature at which all microorganisms in a liquid suspension are killed in 10 minutes is called the __________.
The process of reducing microbial load to safe public health levels is called __________.
The process of removing or killing all forms of microbial life, including endospores, is called __________.
The time required to kill 90% of a microbial population at a given temperature is called the __________ value.
Is boiling water for 10 minutes sufficient to sterilize surgical instruments? (Yes/No)
Is it true that all chemical disinfectants are equally effective against all types of microorganisms? (Yes/No)
Is it true that all microorganisms are killed at 100°C? (Yes/No)
Is it true that all sterilization methods are suitable for all types of materials? (Yes/No)
