Upgrade to remove ads
Microbiology Unit 2 Exam
Terms in this set (24)
· Compare disinfection and antisepsis
disinfection - killing microbes on surfaces
antisepsis - killing microbes on skin
· Is commercial sterilization an actual form of sterilization? What is it designed to destroy?
No, it just kills C. botulinum
· Does a bacteriostatic agent kill microbes?
No, it means to inhibit growth, like a fridge
· Remember that there are many factors that influence the effectiveness of disinfection. The key factor is the presence or absence of _____________________
· How does moist heat kill microbes? What is the time, pressure, and temperature in our autoclave? What's the key thing to remember when using an autoclave?
-moist heat denatures proteins
-121 C at 15 psi for 15 min
-they can only sterilize what it can directly affect
· How does dry heat sterilization (like flaming a loop) kill microbes?
kills by oxidation
· What does HEPA stand for?
high-efficiency particulate air
· What are good examples of items that you would use filtration to sterilize?
vaccines, antibiotics (liquids), enzymes
What are the 2 key differences between phenol and phenolics?
-doesn't smell as bad
What is the best example of a phenolic?
· In what environment does a phenolic work where most disinfectants will not?
presence of organic matter
· What is in most antibacterial soaps?
· Where would you find the very effective antiseptic chlorhexidine?
in hospitals for soaps/ oral rinses/ topical
· What does the chlorine in bleach become before it is an effective oxidizing agent?
· Is it generally easier to kill a virus with or without a lipid envelope? Gram-positive or gram-negative bacteria?
-with a lipid envelope
· Which antimicrobial did we talk about that is more effective at killing Mycobacterium than most?
· Define a gene
sequence of genetic material that codes for a functional product, usually a protein
· Difference between genotype and phenotype
genotype - all genetic material
phenotype - observable traits
· DNA complimentary base pairs
A - T
C - G
· What direction is DNA synthesized in (3' -> 5' or 5' -> 3')
· The basic steps of DNA replication. How is the lagging strand different than the leading strand
1) helicase must unwind double helix
2) DNA synthesizes 5' -> 3'
· How is the lagging strand different than the leading strand
-leading strand is synthesized continuously
-lagging strand is synthesized discontinuously
involved in replication A->T C->G (creates complimentary strands)
involved in transcription, reads DNA
OTHER SETS BY THIS CREATOR
unit 4 AP II
unit 3 anatomy & physiology II
OTHER QUIZLET SETS
Immuno - Tumor and Transplant (lecture 1-2)
5.2 MULTIPLE CHOICE ENOCOMICS PRINCIPLE AND FINANCE
Las incapacidades e indignidades para suceder