Aseptic technique in a lab involves some _______-heat sterilization, which uses ___________
heat. However, _________-heat sterilization is more effective because it penetrates cells
better.
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dry, direct, moist
Bisbiguanide are synthesized, ____________-charged molecules used as an antiseptic. They
are broad spectrum against gram positive and negative, as well as _____________. It is
bacteriostatic at _____________ concentrations and _______________ at high concentrations.
Example: Chlorhexidine
Not effective against _____________________ viruses.
Example: Alexidine
Acts ____________ than chlorhexidine.
Give this one a try later!
, positively, yeasts, lower, bactericidal
nonenveloped
faster
Natural Preservatives
Nisin: produced by ______________ lactis and effective gainst gram-______________. Disrupts cell
wall production. Used in cheeses, meats and ____________________.
Natamycin: an ______________ macroide produced by Streptomyces _______________. It is used
in various ____________ products.
Give this one a try later!
Lactococcus, positive, beverages
antifungal, natalensis, dairy
Desiccation, or ________________, works because all cells require water. Although drying
controls growth, it does not ________ all microbes and their endospores, and can grow
back once conditions are more ________________.
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dehydration, kill, favorable
_______________ is less effective at killing endospores and therefore, not considered a
useful sterilization technique.
, Give this one a try later!
boiling
Ionizing radiation includes X-rays, _________-rays, and high-energy ____________ beams. They
alter cell molecular structures. X- rays and ____________-rays are used to sterilize
________________ materials, such as _____________, which can't be autoclaved. ______________
irradiation is normally used for _________ preservation.
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gamma, electron, gamma, packaged, plastic, gamma, food
______________ technique prevents the contamination of sterile surfaces.
Give this one a try later!
aseptic
Disk-diffusion method involves applying different chemicals to separate papers,
placing the papers on an ___________ plate full of bacterium, then the chemical _____________
out of the paper. The larger the zone around the circle, the more ________________ the
agent is.
Give this one a try later!
agar, diffuses, effective
heat. However, _________-heat sterilization is more effective because it penetrates cells
better.
Give this one a try later!
dry, direct, moist
Bisbiguanide are synthesized, ____________-charged molecules used as an antiseptic. They
are broad spectrum against gram positive and negative, as well as _____________. It is
bacteriostatic at _____________ concentrations and _______________ at high concentrations.
Example: Chlorhexidine
Not effective against _____________________ viruses.
Example: Alexidine
Acts ____________ than chlorhexidine.
Give this one a try later!
, positively, yeasts, lower, bactericidal
nonenveloped
faster
Natural Preservatives
Nisin: produced by ______________ lactis and effective gainst gram-______________. Disrupts cell
wall production. Used in cheeses, meats and ____________________.
Natamycin: an ______________ macroide produced by Streptomyces _______________. It is used
in various ____________ products.
Give this one a try later!
Lactococcus, positive, beverages
antifungal, natalensis, dairy
Desiccation, or ________________, works because all cells require water. Although drying
controls growth, it does not ________ all microbes and their endospores, and can grow
back once conditions are more ________________.
Give this one a try later!
dehydration, kill, favorable
_______________ is less effective at killing endospores and therefore, not considered a
useful sterilization technique.
, Give this one a try later!
boiling
Ionizing radiation includes X-rays, _________-rays, and high-energy ____________ beams. They
alter cell molecular structures. X- rays and ____________-rays are used to sterilize
________________ materials, such as _____________, which can't be autoclaved. ______________
irradiation is normally used for _________ preservation.
Give this one a try later!
gamma, electron, gamma, packaged, plastic, gamma, food
______________ technique prevents the contamination of sterile surfaces.
Give this one a try later!
aseptic
Disk-diffusion method involves applying different chemicals to separate papers,
placing the papers on an ___________ plate full of bacterium, then the chemical _____________
out of the paper. The larger the zone around the circle, the more ________________ the
agent is.
Give this one a try later!
agar, diffuses, effective
