Podcast
Questions and Answers
What is the primary focus during the lag phase of bacterial growth?
What is the primary focus during the lag phase of bacterial growth?
- Reproduction
- Acclimation to new environment (correct)
- Chromosome and plasmid reproduction
- Death
Which phase of bacterial growth is characterized by reproduction being greater than death?
Which phase of bacterial growth is characterized by reproduction being greater than death?
- Death phase
- Lag phase
- Logarithmic or exponential phase (correct)
- Stationary phase
What conditions can affect the length of the lag phase in bacterial growth?
What conditions can affect the length of the lag phase in bacterial growth?
- Physiological history of the microorganism
- Oxygen limitation
- Inoculum size (correct)
- Substrate limitation
During which phase of bacterial growth does reproduction equal death due to substrate limitation or adverse environments?
During which phase of bacterial growth does reproduction equal death due to substrate limitation or adverse environments?
What happens during the death phase of bacterial growth?
What happens during the death phase of bacterial growth?
In bacterial growth, what causes vigorous growth via binary fission?
In bacterial growth, what causes vigorous growth via binary fission?
Which type of microorganism prefers oxygen as a terminal electron acceptor but can grow without it?
Which type of microorganism prefers oxygen as a terminal electron acceptor but can grow without it?
What is the electron acceptor used by strict or obligate anaerobes like Clostridium botulinum?
What is the electron acceptor used by strict or obligate anaerobes like Clostridium botulinum?
Which type of foods are described as low in carbohydrates but high in protein and fat?
Which type of foods are described as low in carbohydrates but high in protein and fat?
What is the major function of the nutrient composition of food or substrate?
What is the major function of the nutrient composition of food or substrate?
Where do microaerophiles like Campylobacter jejuni grow best?
Where do microaerophiles like Campylobacter jejuni grow best?
What type of spoilage is associated with fruits and vegetables due to their nutrient composition?
What type of spoilage is associated with fruits and vegetables due to their nutrient composition?
What is the range of sodium chloride concentration for slightly halophilic bacteria to grow?
What is the range of sodium chloride concentration for slightly halophilic bacteria to grow?
Which type of bacteria can grow with or without salt?
Which type of bacteria can grow with or without salt?
What can contribute to spoilage in pasteurized milk, especially if they are psychrotrophs?
What can contribute to spoilage in pasteurized milk, especially if they are psychrotrophs?
What type of food are halophilic bacteria important in?
What type of food are halophilic bacteria important in?
Which type of microbial association involves two or more microorganisms adversely affecting each other's growth?
Which type of microbial association involves two or more microorganisms adversely affecting each other's growth?
What do molds tend to accumulate as osmoregulators?
What do molds tend to accumulate as osmoregulators?
Which mechanism do bacteria use to combat low water activity by accumulating 'compatible solutes'?
Which mechanism do bacteria use to combat low water activity by accumulating 'compatible solutes'?
What is the main premise behind quorum-sensing in bacteria?
What is the main premise behind quorum-sensing in bacteria?
How does low relative humidity affect food stored under such conditions?
How does low relative humidity affect food stored under such conditions?
What is a potentially hazardous food (PHF) characterized by?
What is a potentially hazardous food (PHF) characterized by?
What do synergistic microorganisms achieve when growing together?
What do synergistic microorganisms achieve when growing together?
How can pasteurization contribute to a high SPC in milk?
How can pasteurization contribute to a high SPC in milk?
What are the four common sources of cross-contamination mentioned in the text?
What are the four common sources of cross-contamination mentioned in the text?
How does improper handling and storage affect microbial numbers on plants?
How does improper handling and storage affect microbial numbers on plants?
Which type of water quality is essential for use in food industries according to the text?
Which type of water quality is essential for use in food industries according to the text?
What is a potential carrier of pathogens without showing symptoms mentioned in the text?
What is a potential carrier of pathogens without showing symptoms mentioned in the text?
How should water be treated for use in the food processing industry according to the text?
How should water be treated for use in the food processing industry according to the text?
Which part of plants tend to contain less microorganisms according to the text?
Which part of plants tend to contain less microorganisms according to the text?
