MCQ Bank
A closed air-tight jar containing suitable hygroscopic chemical for the removal of moisture content from the substrate. This instrument is called as
- A) Anaerobic Jar
- B) Desiccator
- C) Incinerator
- D) Hot Air Oven
Select among the following instructions that is important when operating a centrifuge in lab?
- A) Only use one tube at a time
- B) Ensure the tubes are balanced
- C) Always use the same materials in each tube
- D) Do not underfill the tubes
Indicate among the following that can be used to transfer a culture of microorganisms by stabbing the media.
- A) Pipettes
- B) Test Tube
- C) Inoculating loop
- D) Cotton Swab
Select among the following method is used for sterilization of thermolabile solutions?
- A) Pasteurization
- B) Flaming
- C) Incineration
- D) Membrane filtration
Tuberculosis can be cause by transmitted by which of the following source?
- A) Vertical transmission
- B) Vector transmission
- C) Aerosol transmission
- D) Blood transfusion
In whcich Biosafety Level (BSL) Biosafety Cabinet Class III is used?
- A) BSL-1
- B) BSL-4
- C) BSL-3
- D) BSL-2
Select which one of the following parts of a microscope is used to hold the slide in position?
- A) Ocular lens
- B) Objective lens
- C) Eyepiece
- D) Stage and clips
All mentioned are components of compound microscope except
- A) Coarse adjustment
- B) Fine adjustment
- C) Electron gun
- D) Objective lens
Select a symbol is used to express the magnifying power of a microscope?
- A) &
- B) *
- C) X
- D) @
Instrument maintains the temperature for growth of microorganisms can be named as
- A) Water Bath
- B) Autoclave
- C) Hot Air Oven
- D) Incubator
Staphylococcus aureus grow on mannitol salt agar with ------color colonies.
- A) Yellow
- B) Green
- C) Red
- D) Pink
40-90% humidity level in sterilizing chamber is mandatory for working of which chemical?
- A) Chlorine compounds
- B) Ethylene oxide
- C) Oxidants
- D) Alcohols
Complete destruction of all the micro-organisms including spores is called?
- A) Sepsis
- B) Fermentation
- C) Sterlization
- D) Boiling
Choose a type of media that is best suited for isolating a particular bacterial species from a mixed culture?
- A) Enriched media
- B) Undefined media
- C) Selective media
- D) Differential media
Why is LB broth considered a versatile medium for bacterial culture?
- A) Because it lacks essential nutrients
- B) It supports growth of diverse bacterial species
- C) Due to its transparent nature
- D) It promotes fungal growth
What is the primary function of antibiotics?
- A) Enhance viral replication
- B) Activate the immune system
- C) Stimulate bacterial growth
- D) Inhibit or kill bacteria
What does a Colony Forming Unit (CFU) represents in microbiology?
- A) A group of bacterial cells
- B) A unit of bacterial energy
- C) A measure of bacterial motility
- D) A single bacterial cell
What is the purpose of using the McFarland Standard in antibiotic sensitivity testing?
- A) To standardize bacterial inoculum density
- B) To determine the antibiotic concentration
- C) To identify bacterial species
- D) To measure bacterial growth rates
Which growth phase involves a rapid increase in bacterial population due to exponential growth?
- A) Death phase
- B) Lag phase
- C) Log phase
- D) Stationary phase
What is the process by which bacteria reproduce asexually?
- A) Conjugation
- B) Binary fission
- C) Transformation
- D) Transduction