Multiple choice

Which among the following is a symbiotic bacteria?

  1. Nitrosomonas

  2. Beggiatoa

  3. Escherichia coli

  4. Gallionella
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

These bacteria are found in the alimentary canal of human beings. They keep a check on the growth of harmful putrefying bacteria in the gut of the human beings. They also release vitamins K and B12 which are necessary for blood components. In return human host provides shelter and food for these bacteria. So, they are symbiotic bacteria.

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