USING PHYSICAL METHODS IN INHIBITING THE GROWTHOF MICROBES IN VITRO

Name:
Which is the most practical, efficient, and inexpensive method of sterilization?
Refrigeration
UV lamp
Heat
X-Rays
What are the two factors that determine the effectiveness of heat for sterilization?
Temperature and humidity
Pressure and time
Temperature and time
Humidity and time
What can X-rays and gamma and beta rays from radioactive materials do to microorganisms and tissue cells?
Cause mutations
Stimulate growth
Inhibit reproduction
Have no effect
What are some applications of heat for sterilization?
Prevention of food spoilage
Preparation of vaccines
Treatment of chronic diseases
All of the above
Does refrigeration completely inhibit the growth of microorganisms?
Yes
No
Which factor affects the effectiveness of dry-heat sterilization?
Temperature only
Time only
Moisture only
Penetration of heat throughout the material
What is the thermal death point (TDP)?
The temperature required to sterilize a pure culture
The lowest temperature that kills all organisms in a pure culture
The time required to sterilize a pure culture
The temperature at which moisture is required for sterilization
Which method of heat sterilization is faster and more effective?
Moist heat
Dry heat
Incineration
Flaming
Which method is effective for destroying contaminated disposable materials?
Dry-heat baking
Incineration
UV lamp
Refrigeration
What is the most effective procedure before sterilizing equipment or materials with heat?
Apply disinfectant directly
Soak in hot water
Remove protein debris with strong soap, hot water, and a disinfectant
Use a UV lamp
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