East Los Angeles College » Microbiology » Microbiology 020 - General Microbiology » Fall 2021

Question #1

In order to force a population of spore formers in a culture to produce spores, you should ___________.

A. Boil the bacteria.

B. Transfer some of the bacteria to a new tube with fresh media every 24 hours.

C. Give the bacteria fresh media every 24 hours.

D. Starve the bacteria.

Question #2

Endospores are able to survive extreme heat, UV, and other various forms of disinfection.

A. FALSE

B. TRUE

Question #3

Which of the following are spore-formers?

A. Staphylococcus aureus, Micrococcus luteus

B. Staphylococcus aureus, Bacillus subtilis

C. Micrococcus luteus, Clostridium botulinum

D. Clostridium botulinum, Clostridium difficile, Bacillus subtilis, Clostridium perfringens

Question #4

Which one of the following cultures of a spore forming bacterial culture should display the most spores upon staining and observation?

A. 5 hour culture

B. 48 hour culture

C. 12 hour culture

D. 24 hour culture

Question #5

Endospore formation is called ________ and re-entrance into the vegetative state is called _________.

A. Sporulation; germination

B. Germination; sporulation

C. Excystment; sporulation

D. Excystment; germination

Question #6

Endospores are produce by bacteria as a method of replication.

A. FALSE

B. TRUE

Question #7

Which of the following are spore formers?

A. Staphylococcus aureus

B. Bacillus subtilis

C. Escherichia coli

D. Micrococcus luteus