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UPSC Prelims 2022 Paper-1 📅 05 Jun, 2022

Consider the following statements:
1. Biofilms can form on medical implants within human tissues.
2. Biofilms can form on food and food processing surfaces.
3. Biofilms can exhibit antibiotic resistance.

Which of the statements given above are correct?

A
(a) 1 and 2 only
B
(b) 2 and 3 only
C
(c) 1 and 3 only
D
(d) 1, 2 and 3
Result Summary
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UPSC Prelims
2022 • 05 Jun, 2022 • Paper-1
Consider the following statements:
1. Biofilms can form on medical implants within human tissues.
2. Biofilms can form on food and food processing surfaces.
3. Biofilms can exhibit antibiotic resistance.

Which of the statements given above are correct?
Correct Answer
(d) 1, 2 and 3
Biological Formation: Biofilms are highly structured consortiums of bacteria tightly encased in a self-produced protective polymeric matrix. They naturally adhe......
Ref/Book : UPSC Prelims 2022
Ref. Subject Science & Technology
Chapter -
Ref. Topic Biology & Biotechnology
Pg. No -
💡 Analysis & Explanation
Biological Formation ▼
Biofilms are highly structured consortiums of bacteria tightly encased in a self-produced protective polymeric matrix. They naturally adhere to and colonize foreign materials inside the body, such as pacemakers, joint prosthetics, and indwelling catheters (Statement 1 is correct).
Industrial Presence ▼
Outside the body, they readily form on stainless steel, plastic, and biological surfaces in food processing environments, making industrial sanitation notoriously difficult (Statement 2 is correct).
Medical Challenge ▼
The thick extracellular matrix of a biofilm acts as a robust physical barrier, making the bacteria clustered within it highly resistant to conventional antibiotics and immune system attacks compared to independent, free-floating bacteria (Statement 3 is correct).
Conclusion ▼
All statements are scientifically accurate regarding the tenacious behavior of biofilms.
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