Lab 5; O2 requirement and carbohydrate fermentation

Question 1

________: organisms that use o2 for respiration

Answer 1

aerobes

Question 2

________: organisms that grow in the absence of o2

Answer 2

anaerobes

Question 3

_________: are capable of both aerobic and anaerobic metabolism

Answer 3

facultative

Question 4

______________: always preform anaerobic metabolism but are not killed in the presence of O2

Answer 4

Aero tolerant anaerobes

Question 5

________________: best grown at low concentrations of O2

Answer 5

Microaerophiles

Question 6

______________: a medium that allows O2 to move into medium (separates anoxic from oxic zone)

Answer 6

Rezasurin

Question 7

What is the use of enzymes catalase and superoxide dismutase?

Answer 7

When the organism uses O2 it produces highly reactive oxygen species that are threatening to the cell (want to steal electrons) so to nuetralize this threat catalase turns H202 into water and super dismutase destroys O2-