MCQ Bank
What is the percentage of agar in solid medium?
- A) 0.5-0.9
- B) 1.5-2.0
- C) 0.2-0.5
- D) 5-10
Which of the following gives yellow zone on blood agar?
- A) Streptococcus pyogenes
- B) Streptococcus pneumoniae
- C) Enterococcus faecalis
- D) Streptococcus mutans
Which products are obtained by the hydrolysis of starch using α-amylase?
- A) sucrose and maltose
- B) lactose and glucose
- C) maltose and glucose
- D) sucrose and lactose
Which of the following microorganism is alpha hemolytic?
- A) Staphylococcus epidermidis
- B) Staphylococcus saprophyticus
- C) Enterococcus faecalis
- D) Streptococcus pneumoniae
All of the following media are agar based EXCEPT
- A) Selective media
- B) Enriched media
- C) Enrichment media
- D) Differential media
Which of the following is the suitable pH for the growth of bacteria?
- A) 4.5
- B) 7.0
- C) 6.0
- D) 8.5
HEPA filters remove almost all microorganisms larger than about ______.
- A) 0.22 µm
- B) 0.1 µm
- C) 0.3 µm
- D) 0.23 mm
Which of the following medium is prepared from purified ingredients?
- A) Non synthetic medium
- B) Chemically defined medium
- C) Liquid medium
- D) Chemically undefined medium
Which of the following media support the growth of most of the non-fastidious bacteria?
- A) Basal media
- B) Enrichment media
- C) Selective media
- D) Differential media
Which of the following is present in Nutrient broth medium?
- A) Malt extract
- B) Tryptone
- C) Peptone
- D) Glucose
Primary metabolites are produced during ____________ phase.
- A) Log
- B) Death
- C) Lag
- D) Stationary
Which one of the following is a selective medium?
- A) Nutrient Agar
- B) Potato Dextrose Agar
- C) Mannitol Salt Agar
- D) Nutrient Broth
If a culture starts with 20 cells, how many cells will be present after four generations with no cell death?
- A) 80
- B) 320
- C) 160
- D) 200
What are the conditions for performing high-temperature short time (HTST) pasteurization of milk?
- A) 57°C - 68°C for 15 minutes
- B) 135°C to 140°C for 2 to 4 seconds
- C) 63°C for 30 minutes
- D) 72°C to 74°C for 15 to 20 seconds
Which of the following represent the conditions required for the sterilization of glassware using the hot air oven?
- A) 160oC for 2 h
- B) 121oC for 15 min
- C) 160oC for 1 h
- D) 100oC for 3 h
Which of the following microorganism is Beta hemolytic?
- A) Streptococcus pyogenes
- B) Staphylococcus epidermidis
- C) Staphylococcus saprophyticus
- D) Streptococcus pneumoniae
Which of the following is sold under the brand name ‘Cidex’?
- A) Formaldehyde
- B) Propylene oxide
- C) Glutaraldehyde
- D) Chlorine
Which of the following laboratory apparatus is designed to use steam under regulated pressure ?
- A) Incubator
- B) Laminar flow cabinet
- C) Hot air oven
- D) Autoclave
All of the following are advantages of solid state fermentation EXCEPT
- A) Low availability of water reduces possibilities of
- B) Cheap
- C) Environmental friendly
- D) Easy monitoring and control
What is pH required for the growth of Aspergillus niger?
- A) 4.0
- B) 8.5
- C) 7.5
- D) 5.5