Bacterial Growth and Antibiotic Resistance

Fill in the blank: The LB+str plate is used to test for resistance to ______.

• A) Ampicillin

• B) Streptomycin

• C) Both A and B

• D) Neither A nor B

After adding a drop of each culture on the mating plate, what do you use the 3rd sterile inoculating loop?

• Mix the two drops together

• Prop the petri dish lid open

• Get more of one of the samples

• Cut into the agar of the mating plate

Fill in the blank: The temperature of the incubator used in the experiment is ______ °C.

• 25

• 37

• 50

• 100

What is the correct distance to place a drop of Strain II from the drop of Strain I on the mating plate?

• 1/4 inch

• 1/2 inch

• 1 inch

• 2 inches

Fill in the blank: Incubate the plates overnight at 37°C, or for 24–48 hours at ________ temperature.

• room

• cold

• warm

• hot

How much do you open the lid of the petri dish?

• Take it off and put it on the table

• Take it off but don't put it on the table

• Barely enough to get the inoculating loop through

• Just enough to complete the task

How long to do wait to flip the plates upside down?

• Long enough for the liquid to absorb

• 5 seconds

• 30 minutes

• 24 hours