Microbial Growth and Reproduction
Biology ⇒ Microorganisms and Microbiology
Microbial Growth and Reproduction starts at 9 and continues till grade 12.
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Describe the difference between batch culture and continuous culture in microbial growth.
Describe the four phases of a typical bacterial growth curve.
Describe the role of plasmids in bacterial reproduction and growth.
Explain the difference between synchronous and asynchronous microbial growth.
Explain why microbial growth is often plotted on a logarithmic scale.
Explain why the exponential phase of microbial growth is also called the log phase.
Explain why the stationary phase is important in industrial microbiology.
In a laboratory experiment, a bacterial culture is found to have entered the stationary phase. Suggest two possible reasons for this observation.
Which of the following best describes a facultative anaerobe?
(1) Requires oxygen for growth
(2) Cannot survive in oxygen
(3) Can grow with or without oxygen
(4) Requires high salt concentration
Which of the following best describes the death phase in a bacterial growth curve?
(1) Cells divide rapidly
(2) Cells die at a constant rate
(3) Cells are metabolically inactive
(4) Cells are adapting to new environment
Which of the following best describes the process of budding in yeast?
(1) Equal division of cytoplasm
(2) Formation of a small outgrowth that enlarges and detaches
(3) Fusion of two cells
(4) Spore formation
Which of the following environmental factors does NOT directly affect microbial growth?
(1) Temperature
(2) pH
(3) Light intensity
(4) Magnetic field
The minimum, optimum, and maximum temperatures at which a microorganism grows are collectively called its __________ temperatures.
The process by which bacteria take up naked DNA from their environment is called __________.
The process by which yeast cells reproduce asexually is called __________.
The process of transferring genetic material from one bacterium to another using a bacteriophage is called __________.
Obligate anaerobes cannot survive in the presence of oxygen. True or False?
True or False: All bacteria reproduce by mitosis.
True or False: All fungi reproduce only by asexual means.
True or False: All microorganisms require organic carbon for growth.
