UTA MICROBIOLOGY 2460 CORE MAIN EXAMS 1
QUESTIONS AND ANSWERS SURE A+
✔✔Which of the following is suitable for use on tissues for microbial control to prevent
infection?
a. disinfectant
b. antiseptic
c. sterilant
d. water - ✔✔b. antiseptic
✔✔Which biosafety level is appropriate for research with microbes or infectious agents
that pose moderate risk to laboratory workers and the community, and are typically
indigenous? - ✔✔BSL-2
✔✔What best describes a microbial control protocol that inhibits the growth of molds
and yeast? - ✔✔fungistatic
✔✔The decimal reduction time refers to the amount of time it takes to ___? - ✔✔reduce
a microbial population by 90%
✔✔What methods brings about cell lysis due to cavitation induced by rapid localized
pressure changes? - ✔✔sonication
, ✔✔What term describes the time required to kill all of the microbes within a sample at a
given temperature? - ✔✔thermal death time
✔✔What microbial control methods does not actually kill microbes or inhibit their growth
but instead removes them physically from samples? - ✔✔filtration
✔✔What refers to a disinfecting chemical dissolved in alcohol? - ✔✔tincture
✔✔What peroxygen is widely used as a household disinfectant, is inexpensive, and
breaks down into water and oxygen gas? - ✔✔hydrogen peroxide
✔✔What chemical food preservatives is used in the wine industry but may cause
asthmatic reactions in some individuals? - ✔✔sulfites
✔✔Bleach is an example of which group of chemicals used for disinfection? -
✔✔halogen
✔✔Which chemical disinfectant works by methylating enzymes and nucleic acids and is
known for being toxic and carcinogenic? - ✔✔formaldehyde
✔✔Which type of test is used to determine whether disinfectant solutions actively used
in a clinical setting are being used correctly? - ✔✔in-use test
✔✔The effectiveness of chemical disinfectants has historically been compared to that of
which of the following? - ✔✔phenol
✔✔What refers to a germicide that can kill vegetative cells and certain enveloped
viruses but not endospores? - ✔✔low-level germicide
✔✔True/False: Sanitization leaves an object free of microbes. - ✔✔False
✔✔True/False: Ionizing radiation can penetrate surfaces, but nonionizing radiation
cannot. - ✔✔True
✔✔True/False: Moist-heat sterilization protocols require the use of higher temperatures
for longer periods of time than do dry-heat sterilization protocols do. - ✔✔False
✔✔True/False: Soaps are classified as disinfectants. - ✔✔False
✔✔True/False: Mercury-based compounds have fallen out of favor for use as
preservatives and antiseptics. - ✔✔True
QUESTIONS AND ANSWERS SURE A+
✔✔Which of the following is suitable for use on tissues for microbial control to prevent
infection?
a. disinfectant
b. antiseptic
c. sterilant
d. water - ✔✔b. antiseptic
✔✔Which biosafety level is appropriate for research with microbes or infectious agents
that pose moderate risk to laboratory workers and the community, and are typically
indigenous? - ✔✔BSL-2
✔✔What best describes a microbial control protocol that inhibits the growth of molds
and yeast? - ✔✔fungistatic
✔✔The decimal reduction time refers to the amount of time it takes to ___? - ✔✔reduce
a microbial population by 90%
✔✔What methods brings about cell lysis due to cavitation induced by rapid localized
pressure changes? - ✔✔sonication
, ✔✔What term describes the time required to kill all of the microbes within a sample at a
given temperature? - ✔✔thermal death time
✔✔What microbial control methods does not actually kill microbes or inhibit their growth
but instead removes them physically from samples? - ✔✔filtration
✔✔What refers to a disinfecting chemical dissolved in alcohol? - ✔✔tincture
✔✔What peroxygen is widely used as a household disinfectant, is inexpensive, and
breaks down into water and oxygen gas? - ✔✔hydrogen peroxide
✔✔What chemical food preservatives is used in the wine industry but may cause
asthmatic reactions in some individuals? - ✔✔sulfites
✔✔Bleach is an example of which group of chemicals used for disinfection? -
✔✔halogen
✔✔Which chemical disinfectant works by methylating enzymes and nucleic acids and is
known for being toxic and carcinogenic? - ✔✔formaldehyde
✔✔Which type of test is used to determine whether disinfectant solutions actively used
in a clinical setting are being used correctly? - ✔✔in-use test
✔✔The effectiveness of chemical disinfectants has historically been compared to that of
which of the following? - ✔✔phenol
✔✔What refers to a germicide that can kill vegetative cells and certain enveloped
viruses but not endospores? - ✔✔low-level germicide
✔✔True/False: Sanitization leaves an object free of microbes. - ✔✔False
✔✔True/False: Ionizing radiation can penetrate surfaces, but nonionizing radiation
cannot. - ✔✔True
✔✔True/False: Moist-heat sterilization protocols require the use of higher temperatures
for longer periods of time than do dry-heat sterilization protocols do. - ✔✔False
✔✔True/False: Soaps are classified as disinfectants. - ✔✔False
✔✔True/False: Mercury-based compounds have fallen out of favor for use as
preservatives and antiseptics. - ✔✔True
