Quiz 3
1. A microbe that lives in a fridge is a__
o Psychrophile
2. A newly discovered organism was shown to have an optimal growth
temperature of 0 Celsius, showed optimal growth oxygen. Which of the
following describes this organism?
o Psychrophilic, Acidophilic, anaerobic
3. The following are all the ways to measure bacterial growth except___
o Counting physical cell divisions by watching them under a microscope
4. Washing a table with Lysol is an example of ____ while flaming an
inoculation loop is an example of ___
o Disinfection… Sterilization
5. A mouth wash is an example of an ___ and a 10% solution of bleach is an
example of a ___.
o Antiseptic… disinfectant
6. Which of the following types of organisms prefer to live in a hypertonic
environment?
o A halophilic organism
7. To determine the quantity of bacteria in a culture there are___ methods that
include ___ and __ and there are ___ and ___.
o Direct… plate counts… microscope counts… indirect… turbidity… dry
weight
8. If an organism only grows at the bottom of a tube with thioglycate medium,
then its most likely is which of the following?
o An obligate anaerobe
9. Which is true about a bacterial growth curves?
o In log phase cell division is rapidly occurring and you can determine
doubling time for the organism
10. All of the following is true about sterilization EXCEPT.
o Washing a bench down with Lysol is a way to sterilize it.
1. A microbe that lives in a fridge is a__
o Psychrophile
2. A newly discovered organism was shown to have an optimal growth
temperature of 0 Celsius, showed optimal growth oxygen. Which of the
following describes this organism?
o Psychrophilic, Acidophilic, anaerobic
3. The following are all the ways to measure bacterial growth except___
o Counting physical cell divisions by watching them under a microscope
4. Washing a table with Lysol is an example of ____ while flaming an
inoculation loop is an example of ___
o Disinfection… Sterilization
5. A mouth wash is an example of an ___ and a 10% solution of bleach is an
example of a ___.
o Antiseptic… disinfectant
6. Which of the following types of organisms prefer to live in a hypertonic
environment?
o A halophilic organism
7. To determine the quantity of bacteria in a culture there are___ methods that
include ___ and __ and there are ___ and ___.
o Direct… plate counts… microscope counts… indirect… turbidity… dry
weight
8. If an organism only grows at the bottom of a tube with thioglycate medium,
then its most likely is which of the following?
o An obligate anaerobe
9. Which is true about a bacterial growth curves?
o In log phase cell division is rapidly occurring and you can determine
doubling time for the organism
10. All of the following is true about sterilization EXCEPT.
o Washing a bench down with Lysol is a way to sterilize it.
