Q. Nitrite is changed to nitrate by : (a) Nitrobacter (b) Nitrosomonas (c) Pseudomonas (d) Clostridium Solution : Correct option : A There are two steps in nitrification process by…
Q. Enzyme nitrogenase is required for : Nitrification Nitrite reduction Nitrate reduction Nitrogen fixation Solution : Correct option : D Nitrogenase is an enzyme present in legume root roots. It…
Q. Mottled chlorosis occurs due to deficiency of : Nitrogen Phophorus Potassium Sulphur Solution : Correct option :C Potassium is a macronutrient required by the plant in the form of…
Q. Yield of rice is enhanced by : Azolla Anabaena Nostoc Clostridium Solution : Correct option : A The Azolla enters into symbiotic association with a nitrogen fixing bacteria known as Anabaena. It…