Podcast
Questions and Answers
Which organisms live on or in the body of a host and cause some degree of harm?
Which organisms live on or in the body of a host and cause some degree of harm?
- Commensals
- Thermophiles
- Parasites (correct)
- Mesophiles
What does the term obligate refer to in an ecological context?
What does the term obligate refer to in an ecological context?
- The ability to exist in a wide range of conditions
- Existing in a very narrow niche (correct)
- Using chemicals for energy production
- Using oxygen for metabolism
Which process describes the movement of molecules from an area of high concentration to an area of lower concentration?
Which process describes the movement of molecules from an area of high concentration to an area of lower concentration?
- Osmosis
- Diffusion (correct)
- Facilitated diffusion
- Active transport
What is the process called when water diffuses through a semi-permeable membrane?
What is the process called when water diffuses through a semi-permeable membrane?
What is required for the active transport of substances across a membrane?
What is required for the active transport of substances across a membrane?
What will happen to bacteria living in a freshwater stream when moved to salty seawater?
What will happen to bacteria living in a freshwater stream when moved to salty seawater?
Which process requires the use of ATP by a cell?
Which process requires the use of ATP by a cell?
What defines a contractile vacuole in cellular biology?
What defines a contractile vacuole in cellular biology?
Which group do human pathogens generally belong to?
Which group do human pathogens generally belong to?
What type of microorganism thrives in both aerobic and anaerobic conditions?
What type of microorganism thrives in both aerobic and anaerobic conditions?
Which organism cannot survive in an oxygen environment?
Which organism cannot survive in an oxygen environment?
Which media type is suitable for demonstrating the oxygen requirements of microbes?
Which media type is suitable for demonstrating the oxygen requirements of microbes?
Which of the following enzymes converts the toxic superoxide ion into harmless oxygen?
Which of the following enzymes converts the toxic superoxide ion into harmless oxygen?
What type of relationship do E. coli bacteria have with humans as they produce vitamin K?
What type of relationship do E. coli bacteria have with humans as they produce vitamin K?
What type of microorganism requires a small amount of oxygen but cannot grow in normal atmospheric levels?
What type of microorganism requires a small amount of oxygen but cannot grow in normal atmospheric levels?
In what type of environment would a halophile grow best?
In what type of environment would a halophile grow best?
What is the primary structure involved in nutrient absorption in bacterial cells?
What is the primary structure involved in nutrient absorption in bacterial cells?
Which of the following factors limits facilitated diffusion?
Which of the following factors limits facilitated diffusion?
When cells engulf whole cells or large molecules, this process is specifically known as:
When cells engulf whole cells or large molecules, this process is specifically known as:
What type of transport is utilized for polar molecules and ions across the plasma membrane?
What type of transport is utilized for polar molecules and ions across the plasma membrane?
In which conditions does the cell wall help prevent the cell from bursting?
In which conditions does the cell wall help prevent the cell from bursting?
What term describes a bacterial species with optimal growth at refrigeration temperatures?
What term describes a bacterial species with optimal growth at refrigeration temperatures?
Which type of microorganism thrives at temperatures between 45°C and 60°C?
Which type of microorganism thrives at temperatures between 45°C and 60°C?
An organism with an optimum growth temperature of 37°C that survives short high temperature exposures is called:
An organism with an optimum growth temperature of 37°C that survives short high temperature exposures is called:
What is the term used for the period of growth between inoculation and the initiation of maximum bacterial growth?
What is the term used for the period of growth between inoculation and the initiation of maximum bacterial growth?
Which phase of bacterial growth is characterized by cells not being metabolically active?
Which phase of bacterial growth is characterized by cells not being metabolically active?
During which phase does the most rapid increase in bacterial population occur?
During which phase does the most rapid increase in bacterial population occur?
When are antimicrobial agents most effective in combating bacterial infections?
When are antimicrobial agents most effective in combating bacterial infections?
Which stages of bacterial growth indicate that an infected patient is most likely to spread the infection to others?
Which stages of bacterial growth indicate that an infected patient is most likely to spread the infection to others?
What is the principal factor governing the time for visible colonies to develop in an agar culture?
What is the principal factor governing the time for visible colonies to develop in an agar culture?
In a closed culture system, what phenomenon is typically measured to analyze population growth?
In a closed culture system, what phenomenon is typically measured to analyze population growth?
Which of the following statements about binary fission is accurate?
Which of the following statements about binary fission is accurate?
What does an increase in turbidity generally indicate in a microbial culture?
What does an increase in turbidity generally indicate in a microbial culture?
What is a likely outcome of using an intravenous osmotic diuretic during surgery?
What is a likely outcome of using an intravenous osmotic diuretic during surgery?
Which effect indicates therapeutic effectiveness of an osmotic diuretic in a patient post-surgery?
Which effect indicates therapeutic effectiveness of an osmotic diuretic in a patient post-surgery?
What distinguishes bacterial biofilms from planktonic bacteria in their interaction with the immune system?
What distinguishes bacterial biofilms from planktonic bacteria in their interaction with the immune system?
What limitation exists for direct cell counting using a cytometer?
What limitation exists for direct cell counting using a cytometer?
