Common Indicator Organism of Water Pollution: E. coli

Question

The most common indicator organism of water pollution is:

Select an answer

Question & Answer (English)

The most common indicator organism of water pollution is:

  1. Entamoeba
  2. Escherichia coli — Correct Answer
  3. P. typhi
  4. Hydra
Explanation:
Correct Answer Explanation

Escherichia coli (E. coli) is the most common indicator organism used to detect water pollution, specifically fecal contamination. E. coli are coliform bacteria found in the intestines of warm-blooded animals. Their presence in water indicates that sewage or animal waste has entered the water supply.

Incorrect Options Analysis
  • Entamoeba / P. typhi: These are pathogens (causing Dysentery/Typhoid) but usually E. coli is tested first as a broad indicator of contamination.

प्रश्न एवं उत्तर (हिंदी)

जल प्रदूषण का सबसे सामान्य संकेतक जीव (Indicator organism) कौन सा है?

  1. एंटअमीबा
  2. एस्चेरिचिया कोलाई (E. coli) — सही उत्तर
  3. पी. टाइफी
  4. हाइड्रा
स्पष्टीकरण:
सही उत्तर का स्पष्टीकरण

एस्चेरिचिया कोलाई (E. coli) जल प्रदूषण, विशेष रूप से मल प्रदूषण (fecal contamination) का पता लगाने के लिए सबसे सामान्य संकेतक है। ये बैक्टीरिया आंतों में पाए जाते हैं, और पानी में इनकी मौजूदगी यह बताती है कि पानी में सीवेज या गंदगी मिली हुई है।

📚 About this Topic — GK Important Topics

This multiple choice question is from GK Important Topics, Pollution & Climate Change. It has 4 options with a detailed explanation of the correct answer and is available in both English and Hindi (द्विभाषी). Practice more MCQs from GK Important Topics to strengthen your preparation.

Author Avatar
Anvi Classes

Anvi classes for Current Affairs, GK, and General Studies MCQs. Prepare for UPSC, SSC, and other competitive exams with our comprehensive quizzes.