MICR 290 Final Study Guide Questions With
Complete Solutions
Thermophilic |- |CORRECT |ANSWER✔✔-- |Microbes |that |can |survive |the |heat |of |pasteurization
- |Thermo- |relating |to |heat
Pure |(100%) |alcohol |is |the |most |effective |form |of |alcohol |for |use |as |an |antimicrobial |agent |- |
CORRECT |ANSWER✔✔-- |False
- |The |denaturation |of |proteins |caused |by |alcohol |requires |the |presence |of |water, |so |the |most |
effective |antimicrobial |forms |of |alcohol |are |70% |to |90% |solutions
Which |of |the |following |methods |will |destroy |bacterial |endospores? |- |CORRECT |ANSWER✔✔-- |
Sterilization |(Removal |of |all |living |microorganisms)
- |Ex. |Autoclave
__________ |are |infectious |proteins |that |cannot |be |eliminated |by |standard |sterilizing |
techniques. |- |CORRECT |ANSWER✔✔-- |Prions
- |Sustained |heat |for |several |hours |at |extremely |high |temperatures |(900°F |and |above) |will |
reliably |destroy |a |prions
Which |of |the |following |statements |concerning |microbial |death |is |correct? |- |CORRECT |
ANSWER✔✔-- |It |can |be |plotted |on |a |semilogarithmic |graph
- |Rate |of |microbial |death |is |generally |constant |for |a |given |microbial |species
,Soaps |and |detergents |are |two |common |examples |of |chemicals |known |as |- |CORRECT |
ANSWER✔✔-- |Surfactants
- |Work |by |decreasing |the |surface |attraction |between |water |molecules.
Which |of |the |following |microbial |control |procedures |creates |pyrimidine |dimers |in |DNA? |- |
CORRECT |ANSWER✔✔-- |Nonionizing |radiation
Which |of |the |following |statements |concerning |autoclaving |is |CORRECT? |- |CORRECT |
ANSWER✔✔-- |Larger |volumes |require |longer |autoclaving |times
-Water |boil |121°C |and |under |15 |psi |of |pressure
-For |an |item |to |be |sterilized |in |an |autoclave, |steam |must |contact |all |of |its |surfaces
What |microbe |can't |be |killed |by |pasteurization? |- |CORRECT |ANSWER✔✔-- |Bacillus |
stearothermophilus
- |Keyword |is |thermo, |meaning |heat |loving
All |of |the |following |microbial |control |methods |are |bacteriostatic |- |CORRECT |ANSWER✔✔-- |
Refrigeration
- |Lyophilization: |Or |freeze |drying |is |a |process |in |which |water |is |removed |from |a |product |after |
it |is |frozen |and |placed |under |a |vacuum
- |Desiccation: |Drying |or |the |removal |of |moisture |from |something
, Water |that |is |boiling |rapidly |is |a |better |disinfectant |than |water |kept |at |a |slow |boil |- |CORRECT |
ANSWER✔✔-- |False
- |No |matter |how |much |heat |is |applied |to |boiling |water, |it |remains |at |the |same |temperature |
and |disinfects |at |the |same |rate.
Which |of |the |following |items |would |typically |be |"sanitized"? |- |CORRECT |ANSWER✔✔-- |
Restaurant |utensils
Antimicrobial |agents |that |disrupt |the |cell |membrane |will |also |damage |- |CORRECT |
ANSWER✔✔-- |The |viral |envelope
A |__________ |solution |of |sugar |or |salt |can |preserve |honey, |jerky, |jams, |and |pickles |- |CORRECT
|ANSWER✔✔-- |Hypertonic
- |Ex. |Seawater |is |hypertonic. |If |you |place |an |animal |or |a |plant |cell |in |a |hypertonic |solution, |the
|cell |shrinks, |because |it |loses |water
A(n) |__________ |is |defined |as |an |antimicrobial |substance |that |is |produced |naturally |by |an |
organism |- |CORRECT |ANSWER✔✔-- |Antibiotic
Sulfonamides |are |structural |__________ |of |para-aminobenzoic |acid |(PABA) |- |CORRECT |
ANSWER✔✔-- |Analogs
- |When |you |recall |how |an |enzyme |works, |it |must |have |a |tight |associated |with |its |substrate. |
Certain |compounds |can |mimic |the |substrate |and |bind |to |the |enzyme, |effectively |inhibiting |it.
Some |bacteria |use |antibacterial |proteins |called |__________ |to |inhibit |the |growth |of |other |
bacterial |strains. |- |CORRECT |ANSWER✔✔-- |Bacteriocins
Complete Solutions
Thermophilic |- |CORRECT |ANSWER✔✔-- |Microbes |that |can |survive |the |heat |of |pasteurization
- |Thermo- |relating |to |heat
Pure |(100%) |alcohol |is |the |most |effective |form |of |alcohol |for |use |as |an |antimicrobial |agent |- |
CORRECT |ANSWER✔✔-- |False
- |The |denaturation |of |proteins |caused |by |alcohol |requires |the |presence |of |water, |so |the |most |
effective |antimicrobial |forms |of |alcohol |are |70% |to |90% |solutions
Which |of |the |following |methods |will |destroy |bacterial |endospores? |- |CORRECT |ANSWER✔✔-- |
Sterilization |(Removal |of |all |living |microorganisms)
- |Ex. |Autoclave
__________ |are |infectious |proteins |that |cannot |be |eliminated |by |standard |sterilizing |
techniques. |- |CORRECT |ANSWER✔✔-- |Prions
- |Sustained |heat |for |several |hours |at |extremely |high |temperatures |(900°F |and |above) |will |
reliably |destroy |a |prions
Which |of |the |following |statements |concerning |microbial |death |is |correct? |- |CORRECT |
ANSWER✔✔-- |It |can |be |plotted |on |a |semilogarithmic |graph
- |Rate |of |microbial |death |is |generally |constant |for |a |given |microbial |species
,Soaps |and |detergents |are |two |common |examples |of |chemicals |known |as |- |CORRECT |
ANSWER✔✔-- |Surfactants
- |Work |by |decreasing |the |surface |attraction |between |water |molecules.
Which |of |the |following |microbial |control |procedures |creates |pyrimidine |dimers |in |DNA? |- |
CORRECT |ANSWER✔✔-- |Nonionizing |radiation
Which |of |the |following |statements |concerning |autoclaving |is |CORRECT? |- |CORRECT |
ANSWER✔✔-- |Larger |volumes |require |longer |autoclaving |times
-Water |boil |121°C |and |under |15 |psi |of |pressure
-For |an |item |to |be |sterilized |in |an |autoclave, |steam |must |contact |all |of |its |surfaces
What |microbe |can't |be |killed |by |pasteurization? |- |CORRECT |ANSWER✔✔-- |Bacillus |
stearothermophilus
- |Keyword |is |thermo, |meaning |heat |loving
All |of |the |following |microbial |control |methods |are |bacteriostatic |- |CORRECT |ANSWER✔✔-- |
Refrigeration
- |Lyophilization: |Or |freeze |drying |is |a |process |in |which |water |is |removed |from |a |product |after |
it |is |frozen |and |placed |under |a |vacuum
- |Desiccation: |Drying |or |the |removal |of |moisture |from |something
, Water |that |is |boiling |rapidly |is |a |better |disinfectant |than |water |kept |at |a |slow |boil |- |CORRECT |
ANSWER✔✔-- |False
- |No |matter |how |much |heat |is |applied |to |boiling |water, |it |remains |at |the |same |temperature |
and |disinfects |at |the |same |rate.
Which |of |the |following |items |would |typically |be |"sanitized"? |- |CORRECT |ANSWER✔✔-- |
Restaurant |utensils
Antimicrobial |agents |that |disrupt |the |cell |membrane |will |also |damage |- |CORRECT |
ANSWER✔✔-- |The |viral |envelope
A |__________ |solution |of |sugar |or |salt |can |preserve |honey, |jerky, |jams, |and |pickles |- |CORRECT
|ANSWER✔✔-- |Hypertonic
- |Ex. |Seawater |is |hypertonic. |If |you |place |an |animal |or |a |plant |cell |in |a |hypertonic |solution, |the
|cell |shrinks, |because |it |loses |water
A(n) |__________ |is |defined |as |an |antimicrobial |substance |that |is |produced |naturally |by |an |
organism |- |CORRECT |ANSWER✔✔-- |Antibiotic
Sulfonamides |are |structural |__________ |of |para-aminobenzoic |acid |(PABA) |- |CORRECT |
ANSWER✔✔-- |Analogs
- |When |you |recall |how |an |enzyme |works, |it |must |have |a |tight |associated |with |its |substrate. |
Certain |compounds |can |mimic |the |substrate |and |bind |to |the |enzyme, |effectively |inhibiting |it.
Some |bacteria |use |antibacterial |proteins |called |__________ |to |inhibit |the |growth |of |other |
bacterial |strains. |- |CORRECT |ANSWER✔✔-- |Bacteriocins
