Mineral Nutrition Question 45
45. One of the free -living, anaerobic nitrogen fixer is:
[2010]
(a) Beijernickia
(b) Rhodospirillum
(c) Rhizobium
(d) Azotobacter
Show Answer
Answer : b
Hints & Solution
(b) Rhodospirillum is a free-living, anaerobic nitrogen fixer bacteria. It can synthesize its food in presence of light under anaerobic conditions. Beijernickia and Azotobacter are free living aerobic nitrogen fixing bacteria. Rhizobium is a symbiotic nitrogen fixing bacteria.
