Multiple choice

Which of the following is a nitrogen fixing bacterium?

  1. Rhozobium

  2. Acetobacter

  3. Mycoplasma

  4. Chlamydia
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Rhizobium is a well-known nitrogen-fixing bacterium that forms symbiotic relationships with legume plants, converting atmospheric nitrogen into ammonia in root nodules. The question misspells it as 'Rhozobium', but this is clearly the intended answer. Acetobacter produces acetic acid, Mycoplasma lacks a cell wall, and Chlamydia is an intracellular pathogen - none fix nitrogen.

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