Microbiology Questions and Answers – Infection Process – Penetration of Epithelial Cell Layers

This set of Microbiology Multiple Choice Questions & Answers (MCQs) focuses on “Infection Process – Penetration of Epithelial Cell Layers”.

1. Which of the following microorganism causes infection in burns?
a) Pseudomonas aeruginosa
b) Clostridium perfringens
c) Borrelia sp
d) Streptococcus sp
View Answer

Answer: a
Explanation: Burns often become infected by Pseudomonas aeruginosa or other aerobic or facultatively anaerobic bacteria from the surrounding.

2. V. cholerae does not penetrate into the body.
a) True
b) False
View Answer

Answer: a
Explanation: V. cholerae, the causative agent of cholera, multiplies on the epithelial layer of the small intestine where it produces a toxin that causes the loss of fluid from the epithelial cells and kills the cells.

3. Which of the following microorganism causes relapsing fever in humans?
a) Pseudomonas aeruginosa
b) Clostridium perfringens
c) Borrelia sp.
d) Streptococcus sp.
View Answer

Answer: c
Explanation: Borrelia sp. cause relapsing fever in humans when the spirochetes are introduced through the bite of a tick or a body louse.
advertisement
advertisement

4. Which of the following microorganism participates in active penetration into the body?
a) Clostridium perfringens
b) Shigella
c) Borrelia sp.
d) Pseudomonas aeruginosa
View Answer

Answer: b
Explanation: In bacillary dysentery, Shigella bacteria penetrate into and kill the epithelial cells of the colon, then spread to adjacent cells, which are in turn killed.

5. Wounds and burns represent one active mechanism.
a) True
b) False
View Answer

Answer: b
Explanation: Wounds and burns represent one passive mechanism and they can introduce pathogens directly into the underlying tissues.

6. Bacillary dysentery is caused by which of the following microorganism?
a) Clostridium perfringens
b) Borrelia sp.
c) Shigella
d) Pseudomonas aeruginosa
View Answer

Answer: c
Explanation: Bacillary dysentery is caused by Shigella bacteria which penetrate into and kill the epithelial cells of the colon, then spread to adjacent cells, which are in turn killed.

7. In which of the following body part does the influenza virus does not penetrate?
a) small intestine
b) nasopharynx
c) trachea
d) bronchi
View Answer

Answer: a
Explanation: The influenza virus penetrates the epithelial cells lining the nasopharynx, trachea and bronchi.
advertisement

8. Which of the following is an arthropod?
a) Clostridium perfringens
b) Borrelia sp.
c) Shigella
d) Pseudomonas aeruginosa
View Answer

Answer: b
Explanation: Arthropods follow passive penetration such as that by Borrelia species which causes relapsing fever in humans.

Sanfoundry Global Education & Learning Series – Microbiology.

advertisement

To practice all areas of Microbiology, here is complete set of 1000+ Multiple Choice Questions and Answers.

advertisement
advertisement
Subscribe to our Newsletters (Subject-wise). Participate in the Sanfoundry Certification contest to get free Certificate of Merit. Join our social networks below and stay updated with latest contests, videos, internships and jobs!

Youtube | Telegram | LinkedIn | Instagram | Facebook | Twitter | Pinterest
Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

Subscribe to his free Masterclasses at Youtube & discussions at Telegram SanfoundryClasses.