Multiple Choice
Which bacterial culture will have the highest growth rate?
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10. Dynamics of Microbial Growth
Temperature Requirements for Microbial Growth
Back10. Dynamics of Microbial Growth
Temperature Requirements for Microbial Growth
- Multiple ChoiceWhich group of bacteria is capable of growing at cold temperatures (e.g., around 0–15°C) and often has an optimum growth temperature below 15°C?
- Multiple ChoiceWhich group of bacteria can grow and reproduce at cold temperatures (e.g., at or below 0–10°C)?
- Multiple Choice
The temperature of a human body is anywhere from 35-40C. What type of pathogen can infect humans?
- Textbook Question
Which one of the following temperatures would most likely kill a mesophile?
a. -50℃
b. 0℃
c. 9℃
d. 37℃
e. 60℃
1views - Multiple Choice
What is the optimum growth temperature of mesophiles?
- Textbook Question
By deep-freezing, bacteria can be stored without harm for extended periods. Why do refrigeration and freezing preserve foods?
1views - Textbook Question
The _____________ is the time needed to kill 90 percent of a given microbial population at a set temperature. The _____________ is the lowest temperature needed to kill all microbes in a sample within 10 minutes.
2views - Textbook Question
The thermal death time for a suspension of Bacillus subtilis endospores is in dry heat and less than in an autoclave. Which type of heat is more effective? Why?
1views - Textbook Question
You have a patient who is suffering from a Clostridioides difficile infection. Which of the following would most likely be recommended to decontaminate small heat-stable equipment used for the patient?
a. Autoclave all equipment at 121°C for 15 minutes.
b. Boil equipment for 3 minutes.
c. Place the equipment in a hot-air oven at 121°C for 15 minutes.
d. Treat all equipment with a detergent solution.
e. None of the above.
1views - Textbook Question
Calculate the decimal reduction time (D) for the two temperatures in the following graph.
1views - Textbook Question
Label each statement that follows as true or false, and correct the false statements so they are true:
a. Most pathogens would be considered mesophilic alkaliphiles.
b. Sterilization is a form of decontamination.
c. Disinfection is a form of decontamination.
d. High-level germicides achieve sterilization.
e. Ionizing radiation is a form of chemical microbial control.
f. Standard pasteurization is a way to sterilize milk.
1views - Textbook Question
The lowest temperature at which a microbe continues to metabolize is called its ___________ .
1views - Multiple Choice
A thermophile or a hyperthermophile species would have thermo-stable proteins & enzymes that…
- Textbook Question
If pasteurization does not achieve sterilization, why is pasteurization used to treat food?