Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
19 Cards in this Set
- Front
- Back
|
Aerobes |
Need oxygen for their growth |
|
|
Anaerobes |
Cannot grow in the presence of oxygen. These bacteria carry out fermentation to obtain their energy in form of ATP. |
|
|
Aerotolerant anaerobes |
Survive in oxygen but does not use oxygen |
|
|
What is the reason why anaerobic bacteria cannot tolerate oxygen? |
because they cannot produce any of enzymes that neutralize oxygen. They lack the enzymes |
|
|
Obligate anaerobe |
Cannot survive in the presence of oxygen. |
|
|
Facultative anaerobes |
Can grow with or without oxygen |
|
|
Microaerophilics |
Grow best in decreased O2 |
|
|
What does thioglycollate broth do? |
Removes oxygen (Helps to create an anaerobic environment. |
|
|
SUPEROXIDE DISMUTASE |
is an enzyme that helps break down potentially harmful oxygen molecules in cells |
|
|
What do these enzymes do? (Superoxide dismutase, catalase, peroxidase?) |
Breakdown toxic forms of o2 |
|
|
Catalase |
Converts hydrogen peroxide |
|
|
Peroxidase |
does not produce oxygen only water |
|
|
In lab 11 was Clostridium butyricum...Obligate aerobe or obligate anaerobe? |
Obligate Anaerobe |
|
|
In lab 11 was E.coli...Facultative anaerobe or anaerobic? |
Facultative anaerobe |
|
|
In lab 11 was P. aeruginosa...a Obligate aerobe or obligate anaerobe? |
Obligate aerobe |
|
|
Catabolism |
Breakdown molecules. Ex. Glucose |
|
|
What is a critical factor important in the ability of bacteria to grow in a given environment? |
presence or absence of molecular oxygen |
|
|
Why aerobic bacteria are not affected by oxygen? |
they produce enzymes such as catalase, perioxidase, and/or superioxide dismutase that break down toxic forms of oxygen |
|
|
Capnophiles |
Use CO2 for growth |
