Podcast
Questions and Answers
What is the term used to describe the time between bacterial cell divisions?
What is the term used to describe the time between bacterial cell divisions?
- Division period
- Generation time (correct)
- Fission duration
- Replication interval
Which of the following is NOT a physical factor that influences the rate of bacterial growth?
Which of the following is NOT a physical factor that influences the rate of bacterial growth?
- Carbon availability (correct)
- Temperature
- pH
- Osmotic pressure
What is the optimum temperature range for the growth of psychrotrophs?
What is the optimum temperature range for the growth of psychrotrophs?
- 20°C to 30°C (correct)
- 50°C to 60°C
- 0°C or below
- 15°C or below
Which group of bacteria is most likely to cause disease or food spoilage in cold environments?
Which group of bacteria is most likely to cause disease or food spoilage in cold environments?
Which of the following statements about mesophiles is correct?
Which of the following statements about mesophiles is correct?
What is the minimum temperature at which thermophiles can grow?
What is the minimum temperature at which thermophiles can grow?
What is the primary role of water in the environment for microorganisms?
What is the primary role of water in the environment for microorganisms?
What is the optimal water activity (aw) required for microbial growth and multiplication?
What is the optimal water activity (aw) required for microbial growth and multiplication?
How do freeze-dried foods prevent spoilage by microorganisms?
How do freeze-dried foods prevent spoilage by microorganisms?
What is the primary function of a solidifying agent in a culture medium?
What is the primary function of a solidifying agent in a culture medium?
What is the unique property of agar that allows it to be used as a solidifying agent in culture media?
What is the unique property of agar that allows it to be used as a solidifying agent in culture media?
How does the water activity of foods relate to the rate of food spoilage?
How does the water activity of foods relate to the rate of food spoilage?
Which of the following statements about thermophiles is correct?
Which of the following statements about thermophiles is correct?
Which of the following statements about pH preferences of microorganisms is correct?
Which of the following statements about pH preferences of microorganisms is correct?
What is the primary reason for using buffers in microbial growth media?
What is the primary reason for using buffers in microbial growth media?
Which of the following statements about osmotic pressure and microbial growth is correct?
Which of the following statements about osmotic pressure and microbial growth is correct?
Which of the following microorganisms is classified as an acidophile?
Which of the following microorganisms is classified as an acidophile?
Which of the following pH ranges is associated with alkaliphiles?
Which of the following pH ranges is associated with alkaliphiles?
What is the main characteristic of polysaccharides made by red algae?
What is the main characteristic of polysaccharides made by red algae?
What is the purpose of chemically defined media?
What is the purpose of chemically defined media?
Which statement about anaerobic growth media is true?
Which statement about anaerobic growth media is true?
What is the main advantage of complex media over chemically defined media?
What is the main advantage of complex media over chemically defined media?
Which method is used to directly measure bacterial growth?
Which method is used to directly measure bacterial growth?
If a dilution of 1/10,000 contains 40 CFU (Colony Forming Units), what does N0 represent?
If a dilution of 1/10,000 contains 40 CFU (Colony Forming Units), what does N0 represent?
Which of the following elements is NOT required as an enzyme cofactor for bacteria?
Which of the following elements is NOT required as an enzyme cofactor for bacteria?
What type of bacteria is Pseudomonas, a common nosocomial pathogen?
What type of bacteria is Pseudomonas, a common nosocomial pathogen?
Which of the following is a characteristic of Facultative Anaerobes?
Which of the following is a characteristic of Facultative Anaerobes?
Which trace element is commonly found in tap water and used as an enzyme cofactor?
Which trace element is commonly found in tap water and used as an enzyme cofactor?
Which type of bacteria can carry out fermentation regardless of the presence of oxygen?
Which type of bacteria can carry out fermentation regardless of the presence of oxygen?
Which element is used to form proteins and some vitamins in bacteria?
Which element is used to form proteins and some vitamins in bacteria?
