Symbiotic Nitrogen Fixation — Prelims Questions

Which of the following statements about symbiotic nitrogen fixation is INCORRECT?

The pinkish-red colour of root nodules is due to the presence of:

Which of the following elements is a crucial component of the nitrogenase enzyme complex?

The formation of root nodules in legumes involves a specific sequence of events. Which of the following is the correct order?

Which of the following is an example of a symbiotic nitrogen-fixing association involving a non-leguminous plant?

The ammonia ($NH_3$) produced during biological nitrogen fixation is immediately converted into which of the following organic forms in the plant?