Microbial Growth and Reproduction
Biology ⇒ Microorganisms and Microbiology
Microbial Growth and Reproduction starts at 9 and continues till grade 12.
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See sample questions for grade 11
A scientist observes that a bacterial culture stops growing after several hours, even though nutrients are still present. Suggest one possible reason for this observation.
Describe one way in which microbial growth can be controlled in food preservation.
Describe the four phases of the bacterial growth curve.
Explain the difference between batch culture and continuous culture in microbial growth.
Explain the importance of the stationary phase in the bacterial growth curve for industrial fermentation processes.
Explain why microbial growth is often measured by turbidity in a liquid culture.
Explain why the log phase is also called the exponential phase in microbial growth.
A scientist observes that a bacterial culture stops growing after several hours, even though nutrients are still present. Suggest one possible reason for this observation.
Which of the following best describes a thermophile?
(1) Grows best at low temperatures
(2) Grows best at moderate temperatures
(3) Grows best at high temperatures
(4) Grows best in acidic conditions
Which of the following best describes facultative anaerobes?
(1) Require oxygen for growth
(2) Cannot tolerate oxygen
(3) Can grow with or without oxygen
(4) Only grow in the presence of carbon dioxide
Which of the following best describes the process of sporulation in bacteria?
(1) Formation of a new cell by budding
(2) Formation of a resistant, dormant structure
(3) Exchange of genetic material
(4) Rapid cell division
Which of the following best describes the term 'generation time'?
(1) Time taken for a cell to die
(2) Time taken for a cell to divide
(3) Time taken for a population to halve
(4) Time taken for a cell to mature
The ________ phase of the bacterial growth curve is when cells are adjusting to a new environment and not dividing rapidly.
The process by which a single-celled fungus, such as yeast, forms a new cell by developing a small protrusion is called ________.
The process by which bacteria exchange genetic material through direct contact is called ________.
The process by which viruses reproduce inside a host cell is called the ________ cycle.
True or False: All bacteria form endospores when conditions become unfavorable.
True or False: All fungi reproduce by forming spores.
True or False: All microorganisms reproduce at the same rate under identical conditions.
True or False: All microorganisms require the same nutrients for growth.
