Microbiology

Which of the following media is used for the isolation of cyanobacteria and chemoorganotrophs?

• A) Nutrient agar

• B) BG-11 medium

• C) Tryptone soy broth

• D) Chocolate agar

What is the purpose of using an anaerobic chamber?

• A) To sterilize instruments

• B) To grow anaerobic bacteria

• C) To grow fungi

• D) To store cultures safely

Which of the following is a characteristic of enriched media?

• A) Contains only basic nutrients

• B) Supports the growth of all microorganisms

• C) Contains added supplements such as blood

• D) Inhibits the growth of certain microorganisms

What type of bacteria is best grown on MacConkey Agar (MAC)?

• A) Gram-positive bacteria

• B) Fecal bacteria

• C) Anaerobic bacteria

• D) Pathogenic fungi

What is the main function of a biosafety cabinet?

• A) To store specimens

• B) To provide sterile conditions for culturing

• C) To grow anaerobic bacteria

• D) To protect laboratory personnel from infectious agents

Which of the following is a potential biosafety level (BSL) 4 agent?

• A) Bacillus anthracis

• B) Mycobacterium tuberculosis

• C) Ebola virus

• D) Salmonella sp.

What is the purpose of a HEPA filter in a biosafety cabinet?

• A) To sterilize air

• B) To remove excess moisture from air

• C) To prevent contamination of cultures

• D) To cool the air

What is the best method to dispose of hazardous sharp objects like needles in the laboratory?

• A) Flushing them down the drain

• B) Placing them in a regular trash bin
  

• C) Placing them in a puncture-resistant container for autoclaving and incineration

• D) Recycling them

What is a characteristic of a capnophile?

• A) Grows best in high oxygen concentrations

• B) Requires high carbon dioxide levels to grow

• C) Grows best in anaerobic conditions

• D) Requires high nitrogen levels to grow

What is the appearance of colonies of Pseudomonas on an agar plate?

• A) Flat and smooth

• B) Circular and dry

• C) Mucoid and slimy

• D) Irregular and rough