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WorksheetsControlling Microbial Growth: Control Mechanisms
Total questions: 38
Worksheet time: 25mins
The suffix -cide means “to survive.”
True
False
Antimicrobial agents that kill microorganisms would be classified as ______________.
microbistatic
microbicidal
When all forms of microbial life have been removed or destroyed, it is ______
disinfected
sterilized
neutralized
pasteurized
A mild heating process to destroy a particular spoilage or disease-causing organism is known as...
sterilization
pasteurization
decontamination
degerming
Commercial sterilization uses heat capable of killing ____________________ of the botulism bacteria.
endospores
mycospores
arthrospores
viruses
Physical methods of microbial control include which of the following?
dry and moist heat
pasteurization
halogens
heavy metals
filtration
Any process that destroys the non-spore-forming contaminants on animate objects is:
Disinfection
antisepsis
degermation
sterilization
What is the effect of hypotonic solution to bacterial cell?
shrink
burst
nothing
Bacteria growing in lab environments form:
colonies
gangs
spores
biofilms
You have to clean the for feeding bottle of your baby sister. Which is the best method to use?
disinfection
sanitation
sterilization
antisepsis
You have to clean your utensils for daily use. What process should you use in order for you to protect yourself from getting infection?
(a)
Which of the following is commonly used as chemical disinfectant in the laboratory setting to provide a measure of protection against transmission of the human immunodeficiency virus (HIV)?
iodine
bleach
germicidal soap
hot air
Which of the following is most resistant to antiseptics/sterilization:
prion
bacterial spores
cyst
fungus
Which of the following is least resistant to antiseptics/sterilization:
prion
bacterial spores
enveloped viruses
naked viruses
Which of the following methods is used to preserve food by slowing the metabolic processes of food-borne microbes?
nonionizing radiation
ionizing radiation
freezing
pasteurization
Physical methods of microbial control include which of the following?
dry and moist heat
pasteurization
halogens
heavy metals
filtration
Food that is dried to prevent microbial growth utilizes
lyophilization.
desiccation.
filtration.
ionizing radiation.
When all forms of microbial life have been removed or destroyed, it is ______
disinfected
sterilized
neutralized
pasteurized
Milk and other beverages undergo a mild heating process to destroy a particular spoilage or disease-causing organism. this is known as
sterilization
pasteurization
decontamination
degerming
Antimicrobial agents employ which of the following methods to control the growth of microbes?
Alteration of membrane permeability
Damage to nucleic acids
Damage to proteins
Inactivate viruses by attacking cell membrane lipids.
What is the effect of hypotonic solution to bacterial cell?
shrink
burst
nothing
Osmosis is one of the process in the passive transportation. What is the movement of water when there's high solute concentration outside the cell ?
Water moves from inside to outside the cell
Water moves from outside to inside the cell
There is no movement of water molecules
Gram positive bacteria have a thicker cell wall......
True
False
3. Which of the following instrument works on the principle of batch sterilization?
LAF
Centrifuge
Autoclave
Incubator
Which of the following is used as antiseptic but its effectiveness is limited by the presence of blood products, mucus, or soap (organic matter)?
iodine
formalin 10%
phenol compounds
formaldehyde gas
What is a surfactant?
A molecule that does not adsorb at surfaces
A substance that prevent bubble formation
A molecule that reduces surface tension of a liquid
A substance that is always water soluble
It contains surfactants and are used to wash tableware and kitchen paraphernalia.
solvent cleaners
abrasive cleaners
acid cleaners
detergents
It is the process of making the kitchen paraphernalia free of any microorganisms that may cause sickness and disease.
cleaning
sanitation
steaming
washing
What is filtration?
A method used to separate a solid from a liquid that dissolves in the liquid
A separating technique used to separate a mixture of a solid and liquid where the solid does not dissolve in the liquid
Which control mechanisms can be used on skin?
Sterilization
Antisepsis
Sanitation
Disinfection
Which control mechanim(s) are physical mechanisms?
Desiccation
Refrigeration
Pasteurization
Degermation
