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

Question #1

Which of the following best describes contamination?

A. presence of microorganisms

B. presence of carbon dioxide

C. oxygen free

D. more than one of the above is correct

E. presence of oxygen

F. none of the above is correct

Question #2

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

A. more than one of the above is correct

B. wash them in the sink

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

D. by using the Bunsen burner and flaming them

E. wiping it down with a tissue

F. none of the above is correct

Question #3

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

A. in your hand, facing down

B. on the table, facing up

C. in your hand, facing up

D. more than one of the above is correct

E. on the table, facing down

F. none of the above is correct

Question #4

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

A. sideways

B. upside down

C. right side up

D. more than one of the above is correct

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. more than one of the above is correct

B. prevent contaminating the second culture tube

C. to seal the plastic lid on the tube

D. clean the tube for use in the future

E. none of the above is correct