lab quiz: identification of enetric bacteria and water quality test

Question 1

which of the following correctly describes coliforms?

Answer 1

gram-negative non-endospore forming rods that ferment lactose with acid and gas production

Question 2

what is the puprose of a durham tube?

Answer 2

to test for gas production during fermentation

Question 3

true or false
coliforms are pathogenic organisms

Answer 3

false

Question 4

bacterial growth media that is formulated to prevent the growth of certain organisms called:

Answer 4

selective media

Question 5

for which of the following tests did we use an inoculating needle rather than an inoculating loop?

Answer 5

motility agar

Question 6

bacterial growth media that is formulated to result in visible changes following the growth of certain organisms is called:

Answer 6

differential media