What is nitrogen fixation ?
Important Questions on Plants and Minerals Nutrition
Assertion Free-living bacteria such as Rhizobium and Frankia can help in the biological fixation of dinitrogen in the roots of angiospermous plants.
Reason Prokaryotes exclusively contain nitrogenase enzyme which can catalyze the oxidation reaction of dinitrogen to glutamate.
The correct answer is:
Rhizobium forms a symbiotic association with roots in legumes and fixes atmospheric nitrogen. Which of the following statement is correct about this process?
Fill in the blank with the correct option from the bracket.
Nodule formation involves a sequence of multiple interactions between _____ bacteria and the roots of the host plant. (Azotobacter, Clostridium, Rhizobium)
Fill in the blank with the correct option from the bracket.
The process which involves conversion of nitrates and nitrites into ammonia, nitrogen oxide and nitrogen is called _____. (denitrification, nitrification, ammonification)
Fill in the blank with the correct answer from the bracket.
_____ is the most important source of nitrogen to the plant. (Ammonia, Nitrate, Nitrite)
Fill in the blank with correct answer from the bracket.
A haemoglobin like compound is synthesised in the root nodules of pea plants called _____. (leghaemoglobin, carotenoid, phycobilin)
Fill in the blank with the correct option from the bracket.
The process of converting ammonia to nitrate is known as _____. (ammonification, denitrification, nitrogen fixation, nitrification)
