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WorksheetsMicrobial Growth
Total questions: 13
Worksheet time: 8mins
Bacteria reproduce asexually by a process called
replication
meiosis
mitosis
binary fission
Which of these is aerotolerant anaerobe?
3
1
5
2
Which enzyme catalyzes the reaction:
H2O2 --> H2O + O2
superoxide dismutase
oxidase
peroxidase
catalase
Bacteria that love the cold...
Thermophiles
Mesophiles
Psychrophiles
Halophiles
These are all regarding temperature except...
Psychrophiles
Halophiles
Thermophiles
Mesophiles
Temperature and pH affect cell growth
because...
they can speed up protein/enzyme function
they affect protein/enzyme function
acid fermentation
they don't affect bacterial growth
The data show growth of two species of bacteria cultured in different environments for 48 hours. One plate was exposed to the normal environment. A second was placed in a container with a BD GasPak EZ to help produce an anaerobic environment. Based on the data in the table, we can conclude that S. aureus is a(n)
mesophile.
aerobe.
facultative anaerobe.
facultative halophile.
Are the plates and broths used in practical classes considered Defined Medium or Complex Medium?
Defined Medium
Complex Medium
Selective Media...
grow the bacteria at an extended rate due to the amount of nutrients the bactria will take in
allows you to distinguish bacteria that ferment the
sugar (turns the tube yellow) from those that don’t
(don’t turn the tube yellow-stays red)
Suppress unwanted microbes and encourage
desired microbes; allows only certain bacteria to
grow
Media that allow you to distinguish different
microbes; distinction usually based on color
A laboratory technician uses a MacConkey agar that is designed to suppress the growth of Gram-positive bacteria, and encourage the growth of Gram-negative microbes. MacConkey agar is a type of _____
differential media
selective media
nutrient agar
nutritive media
