18 Questions
What is the process that obligate and facultative anaerobes carry out to produce high-energy phosphate bonds?
Fermentation
Which phase of the bacterial growth curve involves a period of adaptation, where there is no immediate increase in cell numbers?
Lag phase
What is the process called when oxidative phosphorylation uses oxygen as the terminal electron acceptor?
Aerobic respiration
Which microbial growth phase experiences a balance between cell division and cell death, resulting in a constant cell number over time?
Stationary phase
What is the term for the ability of a substance to take up or part with electrons?
Redox potential
During which type of respiration are final electron acceptors other than oxygen used?
Anaerobic respiration
Which of the following is the most accurate description of binary fission in bacteria?
Bacteria divide by enlarging and splitting into two approximately equal daughter cells.
What is the primary factor that determines the generation time or doubling time of a bacterial species?
The external environmental conditions, such as temperature and pH.
Which of the following is the most accurate description of microbial growth?
Microbial growth refers to the increase in the number of microbes in a population.
Which of the following bacterial species has the longest generation time or doubling time?
Lepra bacilli
Which of the following is a key factor in determining the nutritional requirements of bacteria?
The complexity of the bacterial metabolism.
Which of the following is the primary function of bacterial metabolism?
To provide energy for the growth and division of bacterial cells.
Which type of halophilic bacteria requires a high salt environment for survival?
Obligate halophiles
What is the primary mechanism by which bacteria generate ATP?
Oxidation-reduction reactions
Which process is considered an anabolic reaction in bacterial metabolism?
Synthesis of complex materials from simple substances
What is the primary advantage of aerobic cellular respiration compared to anaerobic respiration or fermentation?
It produces more ATP
Which process is considered a catabolic reaction in bacterial metabolism?
Breakdown of carbohydrates
What is the primary mechanism by which ATP is generated in bacterial cells?
Addition of a phosphate group (phosphorylation)
Explore the osmotic and physical stress tolerance of bacteria, including the differences between Obligate Halophiles and Facultative Halophiles. Learn about the impact of salt environments on bacterial survival and the risks of mechanical stress on bacterial walls.
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