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. Let-hemoglobin is a pink colored pigment
D. Nitrogenase helps to convert `N_2` gas into two molecules of ammonia

Answer

A

Explanation

In roots of soyabean, nodule acts as a site for `N_2` fixation. It contains all the necessary biochemical compounds such as nitrogenase and leghaemoglobin. The enzyme nitrogenase is a Fe Mo − protein and catalyzes the conversion of atmospheric `N_2` to `NH_3` this enzyme is extremely sensitive to oxygen. To protect it from oxygen nodules contain an oxygen scavenger called leghaemoglobin. It regulates `O_2` supply by creating anaerobic environment in the cell.