UTA Microbiology Exam 3 Questions With Complete
Solutions
-cides Correct Answers Kill
-static Correct Answers Stop growth
4 Basic Steps of binary fission Correct Answers 1. Growth of
cell size
2. Replication of DNA
3. Division of cytoplasm
4. Septum formation & cell division
Acidophiles Correct Answers Optimal pH < 5.5
Aerotolerant Anaerobes Correct Answers Tolerant of oxygen,
but don't use it
Alkaphiles Correct Answers Optimal pH is 8-10.5
Antisepsis Correct Answers Acts on microbes, but not tissue;
safe on skin
Antiseptic technique is used to prevent contamination of a sterile
environment. Correct Answers True
ART for HIV include the following inhibitors: Correct Answers
Reverse transcriptase, protease, integrase, fusion
Bacteria that grow in a mine drainage are probably______?
Correct Answers Acidophiles
,Bleach is an example of which group of chemicals used for
disinfection? Correct Answers Halogens
Close System Cultures Correct Answers Have finite resources
Common MOA Of Antifungal Drugs Correct Answers
Disruption of sterol synthesis and membrane integrity
Common preservatives include: Correct Answers Sorbic acid,
benzioc acid, propionic acid, sulfur dioxide, nitrites
Coulter counting Correct Answers Detects electrical resistance
change due to cell density
Countable Range Correct Answers 30-300 CFU/ml
Critical Correct Answers Must be sterile; items contact sterile
tissue (in body)
Death Phase Correct Answers Endospores can form; cell
replication < cell death
Degerming Correct Answers Reduces microbial load on living
tissue with use of mechanical process
Disinfection Correct Answers Inactivation of microbes,
removal of some on fomite
During which phase of the growth curve is it most appropriate
for the use of antibiotics? Correct Answers Log phase
, examples of antiseptics Correct Answers alcohol, hydrogen
peroxide
examples of disinfectants Correct Answers Vinegar, bleach
Facultative Anaerobes Correct Answers Can live without
oxygen, but prefer it
Filamentous Cyanobacteria often divide by______? Correct
Answers Fragmentation
Fluorescence Staining Correct Answers Cells are counted
under a microscope or flow cytometer
Following the death phase of the growth curve, ____ cells are
considered the surviving cells & are considered clinically
important due to their association with chronic infections, such
as Tuberculosis. Correct Answers Persisters
Generation Time Correct Answers time it takes to double the
population
Halophiles Correct Answers Salt/solute lovers; found in
oceans
Halotolerant Correct Answers Tolerate high salt, but don't
need it; found in salt marshes where high solutes aren't present
all the time
Solutions
-cides Correct Answers Kill
-static Correct Answers Stop growth
4 Basic Steps of binary fission Correct Answers 1. Growth of
cell size
2. Replication of DNA
3. Division of cytoplasm
4. Septum formation & cell division
Acidophiles Correct Answers Optimal pH < 5.5
Aerotolerant Anaerobes Correct Answers Tolerant of oxygen,
but don't use it
Alkaphiles Correct Answers Optimal pH is 8-10.5
Antisepsis Correct Answers Acts on microbes, but not tissue;
safe on skin
Antiseptic technique is used to prevent contamination of a sterile
environment. Correct Answers True
ART for HIV include the following inhibitors: Correct Answers
Reverse transcriptase, protease, integrase, fusion
Bacteria that grow in a mine drainage are probably______?
Correct Answers Acidophiles
,Bleach is an example of which group of chemicals used for
disinfection? Correct Answers Halogens
Close System Cultures Correct Answers Have finite resources
Common MOA Of Antifungal Drugs Correct Answers
Disruption of sterol synthesis and membrane integrity
Common preservatives include: Correct Answers Sorbic acid,
benzioc acid, propionic acid, sulfur dioxide, nitrites
Coulter counting Correct Answers Detects electrical resistance
change due to cell density
Countable Range Correct Answers 30-300 CFU/ml
Critical Correct Answers Must be sterile; items contact sterile
tissue (in body)
Death Phase Correct Answers Endospores can form; cell
replication < cell death
Degerming Correct Answers Reduces microbial load on living
tissue with use of mechanical process
Disinfection Correct Answers Inactivation of microbes,
removal of some on fomite
During which phase of the growth curve is it most appropriate
for the use of antibiotics? Correct Answers Log phase
, examples of antiseptics Correct Answers alcohol, hydrogen
peroxide
examples of disinfectants Correct Answers Vinegar, bleach
Facultative Anaerobes Correct Answers Can live without
oxygen, but prefer it
Filamentous Cyanobacteria often divide by______? Correct
Answers Fragmentation
Fluorescence Staining Correct Answers Cells are counted
under a microscope or flow cytometer
Following the death phase of the growth curve, ____ cells are
considered the surviving cells & are considered clinically
important due to their association with chronic infections, such
as Tuberculosis. Correct Answers Persisters
Generation Time Correct Answers time it takes to double the
population
Halophiles Correct Answers Salt/solute lovers; found in
oceans
Halotolerant Correct Answers Tolerate high salt, but don't
need it; found in salt marshes where high solutes aren't present
all the time
