MICROBIOLOGY UTA 2460 PACKAGED
ACTUAL EXAM PAPER 2026 QUESTIONS
WITH ANSWERS GRADED A+
• True/False: Ionizing radiation can penetrate surfaces, but nonionizing
radiation cannot..
Answer: True
• What is an enrichment culture?.
Answer: promotes growth of desired microbe when many different
organisms are present
• What is an antimalarial drug that is thought to increase ROS levels in target
cells?.
Answer: artemisinin
• What do Tetracyclines do?.
Answer: inhibit protein synthesis of 30S subunit blocks the binding of
tRNAs with ribosome bacteriostatic broad spectrum
• What does Acyclovir do?.
Answer: antiviral inhibits nucleic acid synthesis herpes virus
• What is the decimal reduction time (DRT)?.
Answer: how much time it takes to kill 90% or 1 log reduction of population
• What are examples of perservatives?.
Answer: sorbic acid, benzonic acid, propionic acid, sulfur dioxide, nitrites,
nisin, natamycin
• Staphylococcus aureus can be grown on multipurpose growth medium or on
mannitol salt agar that contains 7.5% NaCl. The bacterium is ________..
Answer: halotolerant
• What are examples of halogens?.
Answer: iodine, chlorine, bromine, fluorine
,• What is Antiretroviral therapy (ART)?.
Answer: treatment for HIV cocktail of antivirals to target multiple processes
reverse transcriptase inhibitors protease inhibitors integrase inhibitors fusion
inhibitors
• What is bioremediation?.
Answer: using microbes to clean up toxic pollutants (oil spills)
• What do Lincosamides do?.
Answer: inhibit protein synthesis of 50S subunit blocks peptide bond
formation b/t AA bacteriostatic narrow spectrum Streptococcal,
Staphylococcal
• What are examples of alcohols?.
Answer: ethanol and isopropanol
• What does Praziquantel do?.
Answer: antihelminthic induce Ca influx, causes paralysis tapeworms, liver
flukes, blood flukes schistosomiasis
• What is sonication?.
Answer: high frequency sound waves to disrupt cell structure, causes
bubbles to form inside cells and induce lysis
• What is VRSA?.
Answer: Vancomycin-resistant Staphylococcus aureus horizontal gene
transfer from VRE and MRSA
• What is the reason jams and dried meats often do not require refrigeration to
prevent spoilage?.
Answer: low water activity
• What is the thermal death time?.
Answer: the length of time to kill all microbes at a certain temperature
• What antimicrobial inhibits the activity of DNA gyrase?.
Answer: nalidixic acid
, • What does Flucytosine do?.
Answer: antifungal interferes with DNA replication
• Rogosa agar contains yeast extract. The pH is adjusted to 5.2 and
discourages the growth of many microorganisms; however, all the colonies
look similar. The medium is ________ and ________..
Answer: complex and selective
• What is defined as the accumulation of changes that occur as they adapt to
their environments?.
Answer: evolution
• What combinations would most likely contribute to the development of a
superinfection?.
Answer: long-term use of broad-spectrum antimicrobials
• Active growth of a culture may be estimated indirectly by measuring the
following products of cell metabolism: ________ or ________..
Answer: ATP or acid from fermentation
• What do Oxazolidinones do?.
Answer: inhibit protein synthesis of 50S subunit interferes with connection
to 30S subunit Linezolid bacteriostatic broad spectrum
• What chemical food preservatives is used in the wine industry but may
cause asthmatic reactions in some individuals?.
Answer: sulfites
• True/False: Mercury-based compounds have fallen out of favor for use as
preservatives and antiseptics..
Answer: True
• Streptococcus mutans is a major cause of cavities. It resides in the gum
pockets, does not have catalase activity, and can be grown outside of an
anaerobic chamber. The bacterium is probably ___?.
Answer: an aerotolerant anaerobe
• What is the lag phase?.
ACTUAL EXAM PAPER 2026 QUESTIONS
WITH ANSWERS GRADED A+
• True/False: Ionizing radiation can penetrate surfaces, but nonionizing
radiation cannot..
Answer: True
• What is an enrichment culture?.
Answer: promotes growth of desired microbe when many different
organisms are present
• What is an antimalarial drug that is thought to increase ROS levels in target
cells?.
Answer: artemisinin
• What do Tetracyclines do?.
Answer: inhibit protein synthesis of 30S subunit blocks the binding of
tRNAs with ribosome bacteriostatic broad spectrum
• What does Acyclovir do?.
Answer: antiviral inhibits nucleic acid synthesis herpes virus
• What is the decimal reduction time (DRT)?.
Answer: how much time it takes to kill 90% or 1 log reduction of population
• What are examples of perservatives?.
Answer: sorbic acid, benzonic acid, propionic acid, sulfur dioxide, nitrites,
nisin, natamycin
• Staphylococcus aureus can be grown on multipurpose growth medium or on
mannitol salt agar that contains 7.5% NaCl. The bacterium is ________..
Answer: halotolerant
• What are examples of halogens?.
Answer: iodine, chlorine, bromine, fluorine
,• What is Antiretroviral therapy (ART)?.
Answer: treatment for HIV cocktail of antivirals to target multiple processes
reverse transcriptase inhibitors protease inhibitors integrase inhibitors fusion
inhibitors
• What is bioremediation?.
Answer: using microbes to clean up toxic pollutants (oil spills)
• What do Lincosamides do?.
Answer: inhibit protein synthesis of 50S subunit blocks peptide bond
formation b/t AA bacteriostatic narrow spectrum Streptococcal,
Staphylococcal
• What are examples of alcohols?.
Answer: ethanol and isopropanol
• What does Praziquantel do?.
Answer: antihelminthic induce Ca influx, causes paralysis tapeworms, liver
flukes, blood flukes schistosomiasis
• What is sonication?.
Answer: high frequency sound waves to disrupt cell structure, causes
bubbles to form inside cells and induce lysis
• What is VRSA?.
Answer: Vancomycin-resistant Staphylococcus aureus horizontal gene
transfer from VRE and MRSA
• What is the reason jams and dried meats often do not require refrigeration to
prevent spoilage?.
Answer: low water activity
• What is the thermal death time?.
Answer: the length of time to kill all microbes at a certain temperature
• What antimicrobial inhibits the activity of DNA gyrase?.
Answer: nalidixic acid
, • What does Flucytosine do?.
Answer: antifungal interferes with DNA replication
• Rogosa agar contains yeast extract. The pH is adjusted to 5.2 and
discourages the growth of many microorganisms; however, all the colonies
look similar. The medium is ________ and ________..
Answer: complex and selective
• What is defined as the accumulation of changes that occur as they adapt to
their environments?.
Answer: evolution
• What combinations would most likely contribute to the development of a
superinfection?.
Answer: long-term use of broad-spectrum antimicrobials
• Active growth of a culture may be estimated indirectly by measuring the
following products of cell metabolism: ________ or ________..
Answer: ATP or acid from fermentation
• What do Oxazolidinones do?.
Answer: inhibit protein synthesis of 50S subunit interferes with connection
to 30S subunit Linezolid bacteriostatic broad spectrum
• What chemical food preservatives is used in the wine industry but may
cause asthmatic reactions in some individuals?.
Answer: sulfites
• True/False: Mercury-based compounds have fallen out of favor for use as
preservatives and antiseptics..
Answer: True
• Streptococcus mutans is a major cause of cavities. It resides in the gum
pockets, does not have catalase activity, and can be grown outside of an
anaerobic chamber. The bacterium is probably ___?.
Answer: an aerotolerant anaerobe
• What is the lag phase?.
