Which of the following are true about coliform bacteria? (A) They are used to…
2025
Which of the following are true about coliform bacteria?
(A) They are used to test water contamination.
(B) Coliform bacteria are harmless and cause no disease.
(C) They are found naturally in the human intestinal tract.
(D) Their presence in water is an indication of fecal contamination.
Choose the most appropriate answer from the options given below:
- A.
A and D Only
- B.
B and C Only
- C.
A, C, and D Only
- D.
A, B, C, and D
Attempted by 6 students.
Show answer & explanation
Correct answer: C
Coliform bacteria are used as indicators for water contamination (A) and are naturally found in the human intestinal tract (C). Their presence in water indicates fecal contamination (D). However, statement B is incorrect because some coliforms, such as pathogenic E. coli strains, can cause disease.