#1
Which of the following is a basic principle of hygiene?
Regular handwashing
ExplanationPreventing the spread of germs through hand cleanliness.
#2
Which temperature range is considered optimal for most bacterial growth?
20°C - 30°C
ExplanationIdeal temperature range for bacterial proliferation.
#3
What is the primary purpose of autoclaving in microbiology?
Sterilizing equipment
ExplanationEliminating microbial contaminants from laboratory tools.
#4
Which of the following is NOT a method of controlling microbial growth?
Inoculation
ExplanationIntroduction of microorganisms, not control.
#5
What is the Zone of Inhibition in microbiology?
An area without bacterial growth
ExplanationRegion around an antimicrobial disk where bacteria can't grow.
#6
Which of the following is a vector in the transmission of infectious diseases?
Fomites
ExplanationObjects or surfaces that can carry infectious agents.
#7
What is the purpose of the streak plate method in microbiology?
Isolating pure bacterial colonies
ExplanationTechnique to obtain individual bacterial species for study.
#8
What is the main function of agar in microbiological culture media?
Solidifying the media
ExplanationProviding a gel-like consistency for bacterial growth.
#9
Which scientist is credited with the discovery of penicillin, the first antibiotic?
Alexander Fleming
ExplanationDiscoverer of the groundbreaking antibiotic penicillin.
#10
What is the purpose of Gram staining in microbiology?
Identifying bacterial species
ExplanationDistinguishing bacteria based on cell wall characteristics.
#11
What is the role of lysozyme in microbial defense?
Breaking down bacterial cell walls
ExplanationEnzyme capable of degrading bacterial cell walls.
#12
What is the purpose of the Kirby-Bauer disk diffusion method in microbiology?
Testing antibiotic susceptibility
ExplanationAssessment of bacteria's sensitivity to antibiotics.