BIOS 242 Week 4 LATEST UPDATE 126
QUESTIONS AND VERIFIED CORRECT
ANSWERS GUARANTEED SUCCESS
-cide / -cidal - Correct Answer: refer to agents that destroy or permanently inactivate a particular type of microbe
-stasis / -static - Correct Answer: indicates that a chemical or physical agent inhibits microbial metabolism and growth but does not necessarily kill microbes
alcohols - Correct Answer: Bactericidal, fungicidal, and virucidal against enveloped viruses; however they are not effective against fungal spores and bacterial endospores
alcohols - Correct Answer: denature proteins and disrupt cytoplasmic membranes
aldehydes - Correct Answer: Compounds containing terminal -CHO groups
aldehydes - Correct Answer: cross-linking organic functional groups thereby denaturing proteins and inactivating nucleic acids
Alexander Fleming - Correct Answer: reported the antibacterial action of penicillin released from penicillium mold, which creates a zone where bacteria does not grow
allows the cellular contents to leak out - damage that, if not immediately repaired, causes death as long as preventing viral replication - Correct Answer: what do physical and chemical agents do to cell walls?
alteration of cell wall - Correct Answer: if the cell wall is disrupted by physical or chemical agents, it no longer prevents the cell from bursting as water moves into the cell by osmosis
aminoglycosides - Correct Answer: change the shape of the 30S subunit, making it impossible for the ribosome to read the codons of mRNA correctly
analogs - Correct Answer: chemically very similar
antibiotics - Correct Answer: antimicrobial chemicals produced naturally by
microorganisms
antibiotics - Correct Answer: describes antimicrobial agents that are produced naturally by an organism
antimicrobial agents - Correct Answer: drugs that treat infections
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antimicrobial dugs - Correct Answer: includes antibiotics, semi-synthetics, and
synthetics.
antimicrobial enzymes - Correct Answer: enzymes that act against microorganisms
antisense nucleic acids - Correct Answer: drugs that block protein synthesis
antisepsis - Correct Answer: when a chemical is used on skin or other tissue
aseptic - Correct Answer: describes an environment or procedure that is free of
contamination by pathogens
aseptic - Correct Answer: refers to an environment or procedure free of pathogenic contaminants
autoclave - Correct Answer: consists of a pressure chamber, pipes to introduce and evacuate steam, valves to remove air and control pressure, and pressure and temperature gauges to monitor the procedure
azoles and allylamines - Correct Answer: act by inhibiting the synthesis of ergosterol; without ergosterol, a fungal cell's cytoplasmic membrane does not remain intact, and the cell dies
bacitracin - Correct Answer: blocks the transport of NAG and NAM across the
cytoplasmic membrane to the wall
bacterial endospores - Correct Answer: most resilient forms of life. They can survive environmental extremes of temperature, acidity, and dryness and can withstand many chemical disinfectants
bacterial endospores, protozoan cysts, and some viruses - Correct Answer: what can survive boiling at sea level for many minutes or even hours?
beta lactamases - Correct Answer: enzymes that break the beta-lactam rings of
penicillin and similar molecules, rendering them inactive
beta-lactams - Correct Answer: antimicrobials whose functional portions are called ________ rings. They inhibit peptidoglycan formation by irreversibly binding to the enzymes that cross link NAM subunits
biosafety level 1 - Correct Answer: suitable for handling microbes not known to cause disease in healthy humans
biosafety level 2 - Correct Answer: designed for handling moderately hazardous agents
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