Los Angeles Valley College » Microbiology » Microbiology 020 - General Microbiology » Fall 2020

Question #1

Which of the following techniques will dilute the culture directly?

A. none of these are correct

B. pour plate

C. streak plate

D. spread plate

Question #2

Which of the following is usually accompanied by a serial dilution?

A. pour plate

B. none of these are correct

C. spread plate

D. streak plate

Question #3

In a pour plate, why are colonies growing on top of the agar larger than the colonies growing in (within) the agar?

A. the colonies growing within the agar are smaller because they have more access to oxygen

B. the colonies growing within the agar are larger because they have more access to oxygen

C. the colonies growing within the agar are smaller because they have less access to oxygen

D. the colonies growing within the agar are smaller because they have no access to oxygen

Question #4

What is the disadvantage of the streak plate technique?

A. Streak plating doesn't allow identification

B. streak plate technique takes time

C. Streak plating doesn't allow quantifying

Question #5

Can a pure culture be prepared from a mixed broth culture?

A. YES

B. NO

Question #6

How can you determine if the colony that you chose to isolate is a pure culture?

A. If the resulting colonies after the plating method are different

B. If the resulting colonies after the plating method are uniform/ similar

C. If the resulting colonies after the plating method are broken