Exam (elaborations)
BIOS 280 Exam 2; Questions and Answers Rated A+
- Course
- Institution
BIOS 280 Exam 2; Questions and Answers Rated A+
[Show more]
Content preview
BIOS 280 Exam 2; Questions and Answers Rated A+heating to a temp below boiling to kill specific pathogens and increase shelf-time Correct
Ans-pasteurization
salmonella, listeria, mycobacterium, campylobacter, brucella Correct Ans-primary
pathogen targets of pasteurization
autoclaving is a ____ heat method Correct Ans-moist
if____ is increased, higher temps. can be reached Correct Ans-pressure
121 degrees C at 15 PSI Correct Ans-common setting of autoclave
___ min at common autoclave setting is very effective Correct Ans-15
type of radiation that knocks electrons off atoms Correct Ans-ionizing
, BIOS 280 Exam 2; Questions and Answers Rated A+
type of radiation that damages DNA and proteins by breaking bonds Correct Ans-ionizing
exposure to this type of radiation is a hazard to humans Correct Ans-ionizing
type of radiation that penetrates solids and liquids and is used in fruits, vegetables, and now
meats Correct Ans-ionizing
type of radiation that excites atoms but doesn't ionize them Correct Ans-non-ionizing
ex. UV light, sunlight Correct Ans-non-ionizing
ex. gamma rays and x-rays Correct Ans-ionizing
damages DNA by creating T-T dimers Correct Ans-non-ionizing
relatively safe to use, doesn't penetrate solids or liquids well, surface sterilization and water
treatment Correct Ans-non-ionizing radiation
, BIOS 280 Exam 2; Questions and Answers Rated A+
autoclave, an oven at high heat, gamma
Solution containing antibiotic - filtration Correct Ans-sterilization of a scalpel
disruption using sound waves Correct Ans-sonication
many _____ control agents function by disrupting membranes, and altering protein and/or
nucleic acid structure Correct Ans-chemical
effectiveness of chemical control agents is determined by... Correct Ans-concentration,
contact time
type of phenol that is in lysol Correct Ans-p-cresol
_____affect protein function and/or disrupt membranes Correct Ans-phenolics
mainly chlorine, also iodine and flourine, effective against bacteria, fungi, spores, viruses.
Ineffective at alkaline pH Correct Ans-halogens
, BIOS 280 Exam 2; Questions and Answers Rated A+
destroy cell membranes, can coagulate proteins because it dehydrates them Correct Ans-
alcohols
_____alcohol is more microbicidal but also more toxic Correct Ans-isopropanol
70-95% alcohol Correct Ans-ethanol
forms oxygen free radicals which are toxic to all cells. Correct Ans-hydrogen peroxide
Also breaks down to H2O and O2 therefore is strongly effective against anaerobes Correct
Ans-hydrogen peroxide
All solubilize membranes and disrupt proteins Correct Ans-detergents
____ detergents (like soaps) are not very microbicidal, although they may be very effective in
sanitization Correct Ans-non-ionic
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller GOLDTUTORS. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $17.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
77333 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now