MCQ Bank
Secondary metabolites are produced during ____________ phase.
- A) Stationary
- B) Lag
- C) Death
- D) Log
What is another term for tyndallization?
- A) Moist heat sterilization
- B) Dry heat sterilization
- C) Fractional sterilization
- D) Incineration
Which of the following is an active ingredient of 'bleach', a household decontamination product used to kill fungi, bacteria and viruses?
- A) Hydrogen peroxide
- B) Ethyl alcohol
- C) Ethylene oxide
- D) Sodium hypochlorite
Fungi grow optimally at pH __________.
- A) 7.0
- B) 8.5
- C) 6.0
- D) 5.5
Which of the following dye is present in MacConkey agar?
- A) Neutral Red
- B) Methyl orange
- C) Congo red
- D) Phenol Red
HEPA stands for _______________ filters.
- A) High Efficiency Particulate Air
- B) High Efficiency Pollution Air
- C) High Energy Particulate Air
- D) Holding Energy Particulate Air
Which of the following is used for the sterilization of heat-labile solutions?
- A) Incineration
- B) Filtration
- C) Radiation
- D) Ethylene oxide vapors
Which of the following is used for the sterilization of pharmaceuticals and disposable dental and medical supplies?
- A) Ionizing radiation
- B) Moist Heat
- C) Dry Heat
- D) Tyndallization
Which of the following medium is used for the isolation of Staphylococcus aureus?
- A) Nutrient Agar
- B) Mannitol Salt Agar
- C) MacConkey Agar
- D) Blood Agar
Which of the following is the suitable temperature for the growth of mesophilic bacteria?
- A) 25oC
- B) 30oC
- C) 45oC
- D) 37oC
A bacterial culture starts with 20, how many cells will be present after six generations assuming no cell death?
- A) 2560
- B) 640
- C) 1280
- D) 200
Which of the following is used as substrate in assay for α-amylase?
- A) Starch
- B) Glucose
- C) Maltose
- D) Dextrin
What are the conditions required for sterilizing the culture media using an autoclave?
- A) 15 psi, 115oC, 25 min
- B) 15 psi, 121oC, 15 min
- C) 15 psi, 115oC, 15 min
- D) 20 psi, 121oC, 20 min
Which of the following give pale or colorless colonies on MacConkey agar medium?
- A) Klebsiella spp
- B) Shigella spp
- C) Citrobacter spp
- D) Escherichia coli
Which of the following chemical is used for the disinfection of water?
- A) Heavy metals
- B) Iodine
- C) Alcohol
- D) Chlorine
Which of the following cannot be used for disinfection?
- A) 80% ethanol
- B) 60% propanol
- C) Absolute ethanol
- D) 70% isopropanol
Which of the following media is used for the growth of halophilic bacteria?
- A) Mannitol salt agar
- B) MacConkey agar
- C) Blood agar
- D) Nutrient agar
Optimum temperature for the growth of fungi is ____________.
- A) 25oC
- B) 37oC
- C) 45oC
- D) 30oC
The phase in which bacteria prepare themselves for reproduction is ________.
- A) Log phase
- B) Exponential phase
- C) Stationary phase
- D) Lag phase
Which of the following organs secrete amylase in human beings?
- A) liver and pancreas
- B) salivary glands
- C) pancreas and salivary glands
- D) liver, pancreas and salivary glands