Exam (elaborations)
Straighterline Microbiology Exam 4
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Straighterline Microbiology Exam 4
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Straighterline Microbiology Exam4
Microbial control methods that kill/destroy __________ are able to sterilize. - -
endospores
-Sanitization is a process by which - -the microbial load on objects is
reduced.
-An example of an agent that lowers the surface tension of cells is - -alcohol
-High temperatures _______ and low temperatures _______. - -kill cells, inhibit
cell growth
-Microbe(s) that is/are the target(s) of pasteurization include - Both b & c - -
-(Mycobacterium species, Salmonella species) - -
-The primary mode of action of nonionizing radiation is to - -make
pyrimidine dimers
-The most practical method of disinfecting municipal water supplies would
be - -filtration
-A chemical with sporicidal properties is - -glutaraldehyde
-Silver nitrate is used - -in antisepsis of burns.
-Detergents are low-level germicides.The process of destroying non-spore-
forming organisms on inanimate objects fits within the definition of
disinfection. - --TRUE
-The acceptable temperature pressure combination for an autoclave is
131°C and 9 psi. - -FALSE-(The acceptable temperature pressure
combination for an autoclave is 121°C and 15 psi.)
-Ionizing radiation dislodges protons from atoms. - -FALSE- (Ionizing
radiation dislodges electrons from atoms)
-A microbicide is an agent that destroys microorganisms. - -TRUE
-Prions are easily denatured by heat. - -FALSE- (Prions are highly resistant
to denaturation by heat)
, -A compound synthesized by bacteria or fungi that destroys or inhibits the
growth of other microbes is a/an - -antibiotic
-Which statement is not an aim in the use of drugs in antimicrobial therapy?
- -The drug should be broken down and excreted rapidly.
-Drugs that prevent the formation of the bacterial cell wall are - -beta-
lactams.
-Microbial resistance to drugs is acquired through - -(all of these)
conjugation, transformation, transduction
-R factors are ________ that contain a code for ___________. - -plasmids, drug
resistance
-Phage therapy is a technique that uses - -phages to target pathogenic
bacteria in the body.
-Most antihelminthic drugs function by - - -a. weakening the worms so they
can be flushed out by the intestine.
b. inhibiting worm metabolism.
-Which of the following modes of action would be most selectively toxic? - -
preventing cell wall synthesis
-The MIC is the ______ of a drug that is required to inhibit growth of a
microbe. - -smallest concentration
-An antimicrobial drug with a ____ therapeutic index is a better choice than
one with a _____ therapeutic index. - -high, low
-Most antiviral agents work by destroying active viruses.
- TRUE/FALSE - -FALSE (Most antiviral agents work by blocking an essential
viral activity.)
-Sulfonamide drugs work by disrupting protein synthesis.
-TRUE/FALSE - -FALSE (Sulfonamide drugs work by disrupting folic acid
synthesis.)
-Biofilms are difficult to treat and do not always respond to antibiotics.
-True/FALSE - -TRUE
-An antibiotic that disrupts the host's normal biota can cause a
superinfection.
-TRUE/FALSE - -TRUE
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