Bacterial Growth and Culturing Conditions Quiz
Preview:
Which of the following is a physical factor that influences bacterial growth?
A. Carbon source
B. pH level
C. Oxygen concentration
D. Nitrogen fixation
What happens to obligate anaerobes in the presence of oxygen?
A. They can use oxygen for respiration
B. They cannot detoxify oxygen
C. They can grow faster
D. They can detoxify oxygen
What is the role of nitrogen-fixing bacteria in the nitrogen cycle?
A. They fix carbon dioxide into organic molecules
B. They fix nitrogen gas into ammonia
C. They fix nitrogen gas into oxygen
D. They fix oxygen gas into water
How does prokaryotic cell division occur?
A. By conjugation
B. By meiosis
C. By mitosis
D. By binary fission
What happens to bacterial cells in hypertonic environments?
A. They swell
B. They multiply rapidly
C. They shrink
D. They remain the same
What is the purpose of DNA replication in bacterial growth?
A. To duplicate the chromosome
B. To form two daughter cells
C. To duplicate the cell membrane
D. To produce energy for the cell
What is the optimal temperature range for mesophiles?
A. Above 100°C
B. 25-40°C
C. Below 0°C
D. 50-60°C
What is the main difference between bacteria and archaea?
A. Membrane structure
B. Cell wall composition
C. Antibiotic sensitivity
D. All of the above
Where do thermophiles thrive?
A. Deep sea vents
B. Hot springs
C. Saltwater habitats
D. Acidic environments
Which type of bacteria thrives in hot springs?
A. Mesophiles
B. Halophiles
C. Psychrophiles
D. Thermophiles
What is the preferred pH range for neutrophiles?
A. Above 8
B. Below 5
C. Depends on the temperature
D. 5-8
Which domain of life includes most pathogens?
A. Archaea
B. None of the above
C. Bacteria
D. Eukarya
Which chemical factor is required for all life?
A. pH level
B. Oxygen concentration
C. Carbon source
D. Nitrogen fixation
What is the duration of the bacterial growth curve?
A. It depends on the pH level
B. It depends on the temperature
C. It is always the same
D. It varies for each species
Which domain of life includes organisms that live in extreme environments?
A. Bacteria
B. Archaea
C. Eukarya
D. All of the above
