MCB 2010 Final IRSC Exam Questions with Complete Solutions 100% Solved| Grade A+
Which of the following is frequently used in operating rooms to sterilize items that should not
or cannot be exposed to heat? Ethylene oxide
All of the following are characteristics of an ideal antimicrobial agent EXCEPT: It denatures
proteins
Which is the most effective concentration of alcohol? 70%
Non-ionizing radiation is: UV light
UV light causes the formation of: Thymine-thymine dimers
Bacterial ribosomes are: 70s
Boiling water rapidly kills all of the following EXCEPT: Protozoan cysts
Which of the following is the ultimate means of sterilization? Incineration
Which of the following is the most toxic to humans? Ethylene oxide
Factors affecting which antimicrobials will be used include: Nature of site to be treated;
degree of susceptibility of microbes involved; environmental conditions
Another term for the Kirby-Bauer test is the: Disk diffusion test
B-lactamases Are often produced by genes located on resistance plasmids; inactivate
penicillin and related drugs
,B-lactate antibiotics have an effect on which of the following types of cells? Bacterial cells
The most limited group of antimicrobial agents is the ______ drugs. Antiviral
Which of the following is NOT a main side effect of the use of antimicrobials? Synergism
Which of the following best describes selective toxicity regarding drugs? More toxic to
pathogens that to host cells
If a microbiology lab sets up a Kirby-Bauer assay, which of the following will apply: After
incubation, an agar plate with the pathogen will show various zones of inhibition reflecting the
microbe's sensitivity or resistance to each drug
It is inappropriate to prescribe antibacterial agents to treat colds or flu because: These
disease are caused by viruses
Microorganisms can acquire drug resistance by the following: Plasmid transfer; acquiring a
gene that allows production of enzymes that destroy the drug; mutation
What does the MIC measure? Lowest concentration that inhibits bacterial growth
Antimicrobials agents that mimic the chemical structure of DNA building blocks are called:
Nucleotide analogs
_________ are serious secondary infections that result from the killing of the normal
microbiota. Superinfections
Penicillin works by: Inhibition of cell wall synthesis
, Brain and spinal cord infections are difficult to treat because antimicrobial drugs cannot diffuse
out of the blood into these organs. True
Which of the following is NOT involved in the transfer of genetic material? Binary fission
Which of the following has been used to prevent the transmission of gonorrhea from an
infected mother to her newborn? Silver nitrate
Antibiotics that inhibit cell wall synthesis can be used at any time during the bacteria's growth
cycle. False
Which of these is TRUE concerning bacteria and viruses? A bacterium is a cell, but a virus is
not
The virus that causes infectious mononucleosis is called: Epstein-Barr
Which of these causes genital warts? Papilloma virus
Retroviruses can synthesis DNA from RNA because they contain The enzyme reverse
transcriptase
Fungi, where no sexual spore has been found, are in which of the following groups?
Deuteromycota
Which of these causes pneumonia in patients with AIDS? Pneumocystis jiroveci
The virus that causes chicken pox is called Varicella Zoster virus
Which of the following is frequently used in operating rooms to sterilize items that should not
or cannot be exposed to heat? Ethylene oxide
All of the following are characteristics of an ideal antimicrobial agent EXCEPT: It denatures
proteins
Which is the most effective concentration of alcohol? 70%
Non-ionizing radiation is: UV light
UV light causes the formation of: Thymine-thymine dimers
Bacterial ribosomes are: 70s
Boiling water rapidly kills all of the following EXCEPT: Protozoan cysts
Which of the following is the ultimate means of sterilization? Incineration
Which of the following is the most toxic to humans? Ethylene oxide
Factors affecting which antimicrobials will be used include: Nature of site to be treated;
degree of susceptibility of microbes involved; environmental conditions
Another term for the Kirby-Bauer test is the: Disk diffusion test
B-lactamases Are often produced by genes located on resistance plasmids; inactivate
penicillin and related drugs
,B-lactate antibiotics have an effect on which of the following types of cells? Bacterial cells
The most limited group of antimicrobial agents is the ______ drugs. Antiviral
Which of the following is NOT a main side effect of the use of antimicrobials? Synergism
Which of the following best describes selective toxicity regarding drugs? More toxic to
pathogens that to host cells
If a microbiology lab sets up a Kirby-Bauer assay, which of the following will apply: After
incubation, an agar plate with the pathogen will show various zones of inhibition reflecting the
microbe's sensitivity or resistance to each drug
It is inappropriate to prescribe antibacterial agents to treat colds or flu because: These
disease are caused by viruses
Microorganisms can acquire drug resistance by the following: Plasmid transfer; acquiring a
gene that allows production of enzymes that destroy the drug; mutation
What does the MIC measure? Lowest concentration that inhibits bacterial growth
Antimicrobials agents that mimic the chemical structure of DNA building blocks are called:
Nucleotide analogs
_________ are serious secondary infections that result from the killing of the normal
microbiota. Superinfections
Penicillin works by: Inhibition of cell wall synthesis
, Brain and spinal cord infections are difficult to treat because antimicrobial drugs cannot diffuse
out of the blood into these organs. True
Which of the following is NOT involved in the transfer of genetic material? Binary fission
Which of the following has been used to prevent the transmission of gonorrhea from an
infected mother to her newborn? Silver nitrate
Antibiotics that inhibit cell wall synthesis can be used at any time during the bacteria's growth
cycle. False
Which of these is TRUE concerning bacteria and viruses? A bacterium is a cell, but a virus is
not
The virus that causes infectious mononucleosis is called: Epstein-Barr
Which of these causes genital warts? Papilloma virus
Retroviruses can synthesis DNA from RNA because they contain The enzyme reverse
transcriptase
Fungi, where no sexual spore has been found, are in which of the following groups?
Deuteromycota
Which of these causes pneumonia in patients with AIDS? Pneumocystis jiroveci
The virus that causes chicken pox is called Varicella Zoster virus
