fermentation-quiz 4

Question 1

fermentation

Answer 1

formation of waste products. alcohols, organic acids, gases. 
two biochem readings: gas and acid. 
indicator: phenol red ph indicator. 
below 6.8: yellow 
above 8.2: red

Question 2

facultative anaerobes

Answer 2

organisms dont require O for growth, but will still grow better if O is available.

Question 3

microaerophiles

Answer 3

organisms that need low levels of O, cant grow at atmospheric levels of O.

Question 4

growth of anerobic microorganisms

eugon=

Answer 4

=media

contains thioglycolate=consumes co2. rosazurine=redox sensitive indicator; oxidized=pink/red.

Question 5

thioglycolate

Answer 5

can react w oxygen before it penetrates far in the medium, “protecting” bacteria from O.