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Microbiology NBDE part 1 Exam 2025 Questions and Answers

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Microbiology NBDE part 1 Exam 2025 Questions and Answers

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May 7, 2025
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2024/2025
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Microbiology NBDE part 1 Exam
2025 Questions and Answers


T/F Exotoxins are heat labile? - ANSWER✔✔-True


T/F Endotoxins are heat labile? - ANSWER✔✔-False


They are heat stabile


T/F Endotoxins are proteins? - ANSWER✔✔-False


Endotoxins are lipopolysaccharides


T/F Gram positive produce endotoxins? - ANSWER✔✔-False- only Gram -


T/F Gram - produces exotoxins? - ANSWER✔✔-True both Gram + and negative

produces exotoxins


Gram - also produces endotoxins


What bacteria does not have a cell wall? - ANSWER✔✔-Mycoplasm ( including

ureoplasm)

, What bacteria has a cell wall that lacks muramic acid? - ANSWER✔✔-Chlamydia


What bacterias are resistant to Beta- lactam? - ANSWER✔✔-Chlamydia and mycoplasm


What bacterium is Acid-fast staining? - ANSWER✔✔-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? - ANSWER✔✔-Flagella


What organelle is responsible for attachement? Which bacterium has them? -

ANSWER✔✔-Pili or fimbriae


Gram - bacterium


Does prokaryitc flagella has microtubules? - ANSWER✔✔-No


What bacterium have spores? - ANSWER✔✔-Bacillus and chlostridium


The DNA type in prokarytes is lineal or circular? - ANSWER✔✔-circular


Which one is prokaryotic?


Fungi


Bacterium


Virus


Parasites - ANSWER✔✔-Bacterium

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