Prince George Community College » Biology » Bio 2010 - Microbiology » Fall 2021

Question #1

Which of the following best describes contamination?

A. more than one of the above is correct

B. presence of carbon dioxide

C. oxygen free

D. presence of oxygen

E. presence of microorganisms

F. none of the above is correct

Question #2

How should you sterilize materials that will make contact with your culture media?

A. you don't need to sterilize materials that will make contact with your experiment

B. wiping it down with a tissue

C. wash them in the sink

D. by using the Bunsen burner and flaming them

E. more than one of the above is correct

F. none of the above is correct

Question #3

Where should Petri dish lids be placed during the aseptic transfer technique?

A. more than one of the above is correct

B. in your hand, facing up

C. on the table, facing up

D. on the table, facing down

E. in your hand, facing down

F. none of the above is correct

Question #4

Once inoculated with bacteria, how should agar Petri plates be incubated?

A. more than one of the above is correct

B. right side up

C. upside down

D. sideways

E. none of the above is correct

Question #5

Why is it important to flame the test tubes before and after transferring bacteria into fresh, sterile culture media?

A. prevent contaminating the second culture tube

B. clean the tube for use in the future

C. to seal the plastic lid on the tube

D. more than one of the above is correct

E. none of the above is correct