With regard to the bilogical nitrogen fixation by Rhizobium in association with soy bean, which one of the following statement/statements does not hold true?

Options

A. Nitrogenase may require oxygen for its functioning.
B. Nitrogenase is Mo-Fe protein
C. Leg-haemoglobin is a pink coloured pigment.
D. Nitrogenase helps to convert `N_(2)` gas into two molecules of ammonia.

Answer

A

Explanation

The enzyme, nitrogenase which is capable of nitrogen reduction is present exclusively in prokaryotes (e.g., Rhiaobium). It is highly sensitive to `O_(2)` and gets inactivated when exposed to it, thus does not require oxygen for its functioning. Other statements (b), (c) and (d) are true.