GCU BIO 205 FINAL EXAM AND
CORRECT UPDATED ANSWERS.
Moist heat kills microorganisms by - Answer irreversible denaturation of proteins
The autoclave treatment may be monitored by - Answer heat-sensitive tape AND heat-
resistant endospores of Geobacillus stearothermophilus.
Microwaves do not kill organisms directly but kill by - Answer heat generated in the product
Lister developed his ideas on prevention of infection during medical procedures after studying
the work of - Answer Pasteur
Pasteurization results in the sterilization of products - Answer False
Liquid media containing heat-sensitive components would best be sterilized by - Answer
membrane filtration
Phenolics - Answer Denature proteins and destroy cytoplasmic membranes, remain effective
in the presence of detergents or organic material, AND phenolics such as triclosan, have been
widely in various lotions and soaps
100% ethanol is twice as effective as 60% ethanol at controlling bacteria. - Answer False
A heavy metal that is used in the eyes of newborn infants - Answer Silver
Quaternary ammonium compounds are - Answer cationic detergents which help wash
surfaces AND attracted to the negative charge on the microbial cell surface.
Low therapeutic index drug - Answer more toxic to the patient
Which is true of aminoglycosides? - Answer They irreversibly bind to the 30S ribosomal
subunit AND they are bactericidal
CORRECT UPDATED ANSWERS.
Moist heat kills microorganisms by - Answer irreversible denaturation of proteins
The autoclave treatment may be monitored by - Answer heat-sensitive tape AND heat-
resistant endospores of Geobacillus stearothermophilus.
Microwaves do not kill organisms directly but kill by - Answer heat generated in the product
Lister developed his ideas on prevention of infection during medical procedures after studying
the work of - Answer Pasteur
Pasteurization results in the sterilization of products - Answer False
Liquid media containing heat-sensitive components would best be sterilized by - Answer
membrane filtration
Phenolics - Answer Denature proteins and destroy cytoplasmic membranes, remain effective
in the presence of detergents or organic material, AND phenolics such as triclosan, have been
widely in various lotions and soaps
100% ethanol is twice as effective as 60% ethanol at controlling bacteria. - Answer False
A heavy metal that is used in the eyes of newborn infants - Answer Silver
Quaternary ammonium compounds are - Answer cationic detergents which help wash
surfaces AND attracted to the negative charge on the microbial cell surface.
Low therapeutic index drug - Answer more toxic to the patient
Which is true of aminoglycosides? - Answer They irreversibly bind to the 30S ribosomal
subunit AND they are bactericidal
