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 9
A scientist observes that a bacterial culture has stopped increasing in number, but the cells are not dying rapidly. Which phase is the culture most likely in?
Describe how oxygen availability affects the growth of different types of bacteria.
Describe one difference between binary fission and budding.
Describe the four phases of the bacterial growth curve.
Explain the role of nutrients in microbial growth.
Explain why refrigeration slows down the growth of most microorganisms.
Explain why the log phase is also called the exponential phase in microbial growth.
A scientist observes that a bacterial culture has stopped increasing in number, but the cells are not dying rapidly. Which phase is the culture most likely in?
Which of the following best describes facultative anaerobes?
(1) Require oxygen to grow
(2) Grow only in the absence of oxygen
(3) Can grow with or without oxygen
(4) Are killed by oxygen
Which of the following best describes the death phase in a bacterial growth curve?
(1) Rapid cell division
(2) Cells are adapting to the environment
(3) Cells die faster than they reproduce
(4) No change in cell number
Which of the following environmental factors does NOT affect microbial growth?
(1) Temperature
(2) Light intensity
(3) pH
(4) Humidity
Which of the following is a benefit of spore formation in bacteria?
(1) Faster reproduction
(2) Survival in harsh conditions
(3) Increased genetic diversity
(4) None of the above
Microorganisms that grow best at high temperatures are called __________.
The optimal pH for most bacteria to grow is around __________.
The process by which a single parent cell divides into two identical daughter cells is called __________.
The process by which bacteria exchange genetic material through direct contact is called __________.
True or False: All bacteria can grow in extremely acidic environments.
True or False: All fungi reproduce only by sexual means.
True or False: All microorganisms reproduce at the same rate.
True or False: All microorganisms reproduce sexually.
