UPSC Prelims 2022 · Question 37 of 98
UPSC Prelims 2022 question on Biofilm Formation Sites
- ExamUPSC CSE
- Year2022
- PaperGeneral Studies Paper I
- SubjectScience and Technology
- TopicBiology
- DifficultyMedium
- TypeStatement
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?
Show answer
Answer: D. 1, 2 and 3
Verdict
All three statements are correct → Option (d).
Statement by statement
Statement 1 – CORRECT: Biofilm is a thin usually resistant layer of microorganisms that forms on and coats various surfaces including catheters, water pipes, and medical implants within human tissues. These cells are frequently embedded within a self-produced matrix of extracellular polymeric substance (EPS).
Statement 2 – CORRECT: Biofilms are a constant concern in food processing environments. Biofilms of Lactobacillus curvatus could lead to a defect caused by the formation of calcium lactate crystals in Cheddar cheese and they can be present on equipment surfaces.
Statement 3 – CORRECT: Bacteria form biofilms, a kind of matrix, during infection in plants and animals. The biofilm shields the bacteria from antibiotics and helps bacteria survive harsh conditions such as extreme temperature or stress. Thus they can exhibit antibiotic resistance.
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