BIOL 230 Lecture Exam 1 Review Control of Microbial Growth
Microbial Growth Control Quiz
Test your knowledge on microbial growth control with this comprehensive quiz designed for students and professionals in the field of biology. Covering various methods and factors affecting microbial treatment, this quiz will enhance your understanding of sterilization techniques and effective disinfectants.
- 12 engaging questions
- Multiple choice and checkboxes
- Instant feedback on your answers
What does this imply about microbial death?
That death is constant when heated or treated with anti microbial chemicals.
That death is random when heated or treated with anti microbial chemicals
What factors determine the effectiveness of microbial treatment?
Number of microbes
Environment
Time of exposure
Characteristics
Concentration
Water Concentration
What factors affect how microbial control agents function?
Membrane permeability
Denaturization
DNA mutation
Chromosomal synthesis
Heat sterilizes by denaturing proteins of microorganisms.
True
False
Autoclave and boiling are similar because they both heat water to a point where bacterial proteins are denatured but autoclave decreases in pressure making the temperature rise.
True
False
Dry heat sterilizes at 170 degrees Celsius for 2 hour.
True
False
Pasteurization sterilizes because it completely kills all microorganisms preventing spoilage.
True
False
Filtration is needed for heat sensitive solutions; Filtration uses HEPA filters on membrane filters.
True
False
Radiation kills microbes because it damages the microorganisms protein structure.
True
False
Concentration, pH,time and organic matter affect antibiotic effectiveness.
True
False
Discs are soaked in different types of disinfectant in an agar with already grown specific microorganism then incubated further for a time. After the incubation each disk is accessed for results. The "Zone of inhibition" is where microorganisms did not grow thus the greater the diameter of the "zone of inhibition" the more effective the disinfectant is.
Discs are soaked in different types of disinfectant in an agar with already grown specific microorganism then incubated further for a time. After the incubation each disk is accessed for results. The "Zone of inhibition" is where microorganisms did not grow thus the greater the diameter of the "zone of inhibition" the more effective the disinfectant is.
After the test is made if a disinfectant is effective they will repeat the process until the minimum concentration is found that effectively kills the microorganism in 10 minutes.
After the test is made if a disinfectant is effective they will repeat the process until the minimum concentration is found that effectively kills the microorganism in 10 minutes.
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