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D311 WGU Microbiology Section 3 – Questions & Correct Answers
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D311 WGU Microbiology Section 3 – Questions & Correct Answers
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D311 WGU Microbiology Section 3 – Questions &Correct Answers
Which factor determines the level of bioburden (microbial level) allowed and,
therefore, the microbial controls required for items used in a general
healthcare setting? Right Ans - The application or use of the item
Which laboratory biosafety level would be used for managing work with an
organism of moderate risk that is native to the local area? Right Ans - BSL-2
Which microbial control type can be used to completely eliminate all
vegetative bacteria, endospores, fungi, and viruses from an inanimate item?
Right Ans - Sterilization
Which term describes the area specially created and maintained for
performing medical procedures that carry risk from contamination? Right
Ans - Sterile field
Which physical method of control works by removing microorganisms from a
liquid? Right Ans - Filtration
Which physical method of control is used to denature proteins and alter
membranes of microorganisms to prevent spoilage of milk, apple juice, honey,
and other ingestible items to reduce microorganism levels? Right Ans -
Pasteurization
Which technique will ensure that Clostridium botulinum and botulinum toxin
cannot cause foodborne illness? Right Ans - Boiling foods for at least 10
minutes prior to eating
Which method would be used to sterilize an antibiotic solution? Right Ans -
Membrane filtration
Which chemical treatment would be used before a disinfectant to reach a
soiled surface? Right Ans - Surfactant
Which class of chemical disinfectant denatures proteins and disrupts
membranes? Right Ans - Phenolics
, Which chemical is commonly used for hand sanitizers and to degerm a site
prior to injections due to its effective destruction of vegetative bacteria by
denaturing proteins and its quick-drying properties? Right Ans - Alcohols
Which chemical is effective at killing bacterial endospores with sufficient time
and concentration? Right Ans - Peroxygens
Which factor is of particular importance when administering an antibacterial
drug to an immunocompromised patient due to the patient's inability to clear
infections? Right Ans - Bactericidal antimicrobial
Which antibacterial drug works by inhibiting nucleic acid synthesis? Right
Ans - Fluoroquinolones
What is showcased when two antibiotics provide bacteriostatic inhibition
when taken separately but bactericidal inhibition when combined? Right
Ans - Synergism
Which drug class inhibits cell wall biosynthesis? Right Ans - Penicillins
Which antimicrobial agent is effective against a cold sore caused by a herpes
infection? Right Ans - Antivirals
Which organism would be affected by an antimicrobial agent that disrupts
peptidoglycan synthesis? Right Ans - Bacteria
Which structure is damaged by an antifungal that targets ergosterol
synthesis? Right Ans - The cell membrane
Which cellular function would be disrupted by an antimicrobial that targets
peptidoglycan synthesis? Right Ans - Cell wall synthesis
Which molecule is responsible for presenting viral antigen to cytotoxic T cells?
Right Ans - Major histocompatibility complex I (MHC I)
Which statement correctly describes humoral immunity? Right Ans -
Humoral immunity is mediated by B cell-produced antibodies
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