GCU B io 205 Final exam
Qu estions and answ er s
w ith accu r ate
r ationales(PASSED)
Lister - answer used carbolic acid to prevent infections during surgery
Phenol - answer another name for carbolic acid
Disinfection/ sanitization - answer the process of decreasing the number of
microorganisms on or in a substance
Preservation - answer The process of delaying food spoilage
Soaps and detergents work by - answer Mechanical removal
Problems w/ using chlorine to to disinfect drinking water - answer by-products
and Cryptosporidium protozoa
Antiseptic - answer a substance that decreases the number of microorganisms on
human skin
,Pasteurization - answer heating of a liquid for a short period of time to reduce the
number of organisms that could cause spoilage or be pathogenic
Sterilization - answer complete removal of organisms from a material
To be sterile it must completely remove - answer bacteria, endospores, fungi, &
viruses
Nosocomial infection - answer hospital acquired infection
D value/decimal reduction time - answer the time required to kill 90% of a
population of organisms
Protozoan cysts can be killed by.. - answer boiling
Mycobacterium are resistant to chemicals because.. - answer they contain mycolic
acid in their cell wall
Viruses that are more resistant to disinfectants and detergents - answer non-
enveloped
Bacteria that can grow in iodine - answer Pseudomonas species
, Type of microorganisms that are most resistant to disinfectants - answer
endospores
Layer that prevents endospores from crossing - answer mucous membrane
Autoclaving - answer A moist heat treatment that can kill endospores
Clostridium Botulinum most often grows in... - answer low acidic environments;
canned foods
Dry heat - answer Used to sterilize powders, glass, and oils
Filtration - answer primary sterilization method used for liquids
Gamma & X-rays - answer can destroy DNA
UV light kills organisms by... - answer generating thymine dimers
Alcohols are used to kill what organisms - answer vegetative bacteria and fungi
Chemical used to kill all microbial life on items that cannot be autoclaved
(pacemakers) - answer Gluteraldehyde
Aldehyde that can be used as a gas or liquid - answer Formaldehyde
Qu estions and answ er s
w ith accu r ate
r ationales(PASSED)
Lister - answer used carbolic acid to prevent infections during surgery
Phenol - answer another name for carbolic acid
Disinfection/ sanitization - answer the process of decreasing the number of
microorganisms on or in a substance
Preservation - answer The process of delaying food spoilage
Soaps and detergents work by - answer Mechanical removal
Problems w/ using chlorine to to disinfect drinking water - answer by-products
and Cryptosporidium protozoa
Antiseptic - answer a substance that decreases the number of microorganisms on
human skin
,Pasteurization - answer heating of a liquid for a short period of time to reduce the
number of organisms that could cause spoilage or be pathogenic
Sterilization - answer complete removal of organisms from a material
To be sterile it must completely remove - answer bacteria, endospores, fungi, &
viruses
Nosocomial infection - answer hospital acquired infection
D value/decimal reduction time - answer the time required to kill 90% of a
population of organisms
Protozoan cysts can be killed by.. - answer boiling
Mycobacterium are resistant to chemicals because.. - answer they contain mycolic
acid in their cell wall
Viruses that are more resistant to disinfectants and detergents - answer non-
enveloped
Bacteria that can grow in iodine - answer Pseudomonas species
, Type of microorganisms that are most resistant to disinfectants - answer
endospores
Layer that prevents endospores from crossing - answer mucous membrane
Autoclaving - answer A moist heat treatment that can kill endospores
Clostridium Botulinum most often grows in... - answer low acidic environments;
canned foods
Dry heat - answer Used to sterilize powders, glass, and oils
Filtration - answer primary sterilization method used for liquids
Gamma & X-rays - answer can destroy DNA
UV light kills organisms by... - answer generating thymine dimers
Alcohols are used to kill what organisms - answer vegetative bacteria and fungi
Chemical used to kill all microbial life on items that cannot be autoclaved
(pacemakers) - answer Gluteraldehyde
Aldehyde that can be used as a gas or liquid - answer Formaldehyde
