Microbiology NBDE part 1 Exam
2025 Questions and Answers 100%
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T/F Exotoxins are heat labile? - ✔✔True
T/F Endotoxins are heat labile? - ✔✔False
They are heat stabile
T/F Endotoxins are proteins? - ✔✔False
Endotoxins are lipopolysaccharides
T/F Gram positive produce endotoxins? - ✔✔False- only Gram -
T/F Gram - produces exotoxins? - ✔✔True both Gram + and negative produces
exotoxins
Gram - also produces endotoxins
What bacteria does not have a cell wall? - ✔✔Mycoplasm ( including ureoplasm)
What bacteria has a cell wall that lacks muramic acid? - ✔✔Chlamydia
What bacterias are resistant to Beta- lactam? - ✔✔Chlamydia and mycoplasm
What bacterium is Acid-fast staining? - ✔✔Mycobacteria and Nocardia
- The ability to resist acid decolorization due to high content of waxes. in the cell wall.
What organelle is responsible for movement? - ✔✔Flagella
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, What organelle is responsible for attachement? Which bacterium has them? - ✔✔Pili or
fimbriae
Gram - bacterium
Does prokaryitc flagella has microtubules? - ✔✔No
What bacterium have spores? - ✔✔Bacillus and chlostridium
The DNA type in prokarytes is lineal or circular? - ✔✔circular
Which one is prokaryotic?
Fungi
Bacterium
Virus
Parasites - ✔✔Bacterium
Which of the following infectious occur worldwide?
Endemic
Pandemic
Epidemic - ✔✔Pandemic
endemic- occurs at minimal levels within a population
epidemic- More frequently than normal within a population
Which of the following infectious occur more frequently than normal within a
population ?
Endemic
Pandemic
Epidemic - ✔✔Epidemic
Active growth of microorganism with or without symptoms is called....
acute
chronic
COPYRIGHT © 2025 BY EMILLY CHARLOTTE, ALL RIGHTS RESERVED 2
2025 Questions and Answers 100%
Pass
T/F Exotoxins are heat labile? - ✔✔True
T/F Endotoxins are heat labile? - ✔✔False
They are heat stabile
T/F Endotoxins are proteins? - ✔✔False
Endotoxins are lipopolysaccharides
T/F Gram positive produce endotoxins? - ✔✔False- only Gram -
T/F Gram - produces exotoxins? - ✔✔True both Gram + and negative produces
exotoxins
Gram - also produces endotoxins
What bacteria does not have a cell wall? - ✔✔Mycoplasm ( including ureoplasm)
What bacteria has a cell wall that lacks muramic acid? - ✔✔Chlamydia
What bacterias are resistant to Beta- lactam? - ✔✔Chlamydia and mycoplasm
What bacterium is Acid-fast staining? - ✔✔Mycobacteria and Nocardia
- The ability to resist acid decolorization due to high content of waxes. in the cell wall.
What organelle is responsible for movement? - ✔✔Flagella
COPYRIGHT © 2025 BY EMILLY CHARLOTTE, ALL RIGHTS RESERVED 1
, What organelle is responsible for attachement? Which bacterium has them? - ✔✔Pili or
fimbriae
Gram - bacterium
Does prokaryitc flagella has microtubules? - ✔✔No
What bacterium have spores? - ✔✔Bacillus and chlostridium
The DNA type in prokarytes is lineal or circular? - ✔✔circular
Which one is prokaryotic?
Fungi
Bacterium
Virus
Parasites - ✔✔Bacterium
Which of the following infectious occur worldwide?
Endemic
Pandemic
Epidemic - ✔✔Pandemic
endemic- occurs at minimal levels within a population
epidemic- More frequently than normal within a population
Which of the following infectious occur more frequently than normal within a
population ?
Endemic
Pandemic
Epidemic - ✔✔Epidemic
Active growth of microorganism with or without symptoms is called....
acute
chronic
COPYRIGHT © 2025 BY EMILLY CHARLOTTE, ALL RIGHTS RESERVED 2
