BIO226 EXAM 1 REAL EXAM
QUESTIONS AND CORRECT
ANSWERS
Which of the following is most effective for sterilizing mattresses and plastic
petri plates?
Ethylene oxide
Which of the following is added to ground beef to prevent endospore
germination and help retain the meats red color?
Nitrates
Microwaves kill by heat and are very effective as an antimicrobial.
False
Which of the following bacteria have an innate resistance to penicillin?
Mycoplasma pneumoniae
Which disinfectant would be most effective on both endospores and
Mycobacteria?
Gluteraldehyde
, Which of the following organisms would be the MOST difficult to disenfect?
Bacillus cereus
The goal of commercial sterilization protocols is to rid canned foods of
____________________________.
Clostridium botulinum endospores
The lowest temperature at which all cells in a culture are killed in 10 minutes
is the __________________.
Thermal Death Point (TDP)
Which cell type is more susceptible to anionic detergents?
Gram positive
Which of the following external prokaryotic structures are considered to be
virulence factors?
Glycocalyx and fimbriae
Cocci that are arranged in grapelike clusters are referred to as:
Staphylococci
Name a genus of bacteria that form endospores.
QUESTIONS AND CORRECT
ANSWERS
Which of the following is most effective for sterilizing mattresses and plastic
petri plates?
Ethylene oxide
Which of the following is added to ground beef to prevent endospore
germination and help retain the meats red color?
Nitrates
Microwaves kill by heat and are very effective as an antimicrobial.
False
Which of the following bacteria have an innate resistance to penicillin?
Mycoplasma pneumoniae
Which disinfectant would be most effective on both endospores and
Mycobacteria?
Gluteraldehyde
, Which of the following organisms would be the MOST difficult to disenfect?
Bacillus cereus
The goal of commercial sterilization protocols is to rid canned foods of
____________________________.
Clostridium botulinum endospores
The lowest temperature at which all cells in a culture are killed in 10 minutes
is the __________________.
Thermal Death Point (TDP)
Which cell type is more susceptible to anionic detergents?
Gram positive
Which of the following external prokaryotic structures are considered to be
virulence factors?
Glycocalyx and fimbriae
Cocci that are arranged in grapelike clusters are referred to as:
Staphylococci
Name a genus of bacteria that form endospores.
