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Get Answers to all your Questions
Oxygen is harmful for
(a) ferns
(b) nitrogen fixing bacteria
(c) chara
(d) mango tree
Answers (1)
Answer: B
Solution.
Biological nitrogen fixation (BNF) occurs when atmospheric nitrogen is converted to ammonia by a Nitrogenase enzyme. Nitrogenases are rapidly degraded by oxygen. For this reason, many bacteria cease production of the enzyme in the presence of oxygen. Many nitrogen-fixing organisms exist only in anaerobic conditions, respiring to draw down oxygen levels, or binding the oxygen with a protein such as leghemoglobin.
Hence, the correct option of this question is option B
View full answer
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