Question

5. The enzyme nitrogenase

1. requires oxygen for activation
2. is a plant enzyme whose production is induced by symbiotic bacteria
3. can only function under low oxygen concentrations
4. can only be produced by bacteria associated with plant roots

Answer 1

5. The enzyme nitrogenase-

Ans: c. can only function under low oxygen concentrations.

explanation: Nitrogenase is an enzyme which catalyzes the reduction reaction of nitrogen gas to ammonia. This is a important step in nitrogen fixation. Some free living and some symbiotic bacteria have this enzyme. The activity of nitrogenase enzyme is inhibited by dioxygen.