+1-315-636-4485
+91 98151-74050 
These MCQs are designed in such a way, which focuses mainly on inorganic plant nutrition, wherein you will learn the study of the methods to identify elements essential to growth and development of plants and the criteria for establishing the essentiality and also study the role of the essential elements, their major deficiency symptoms and the mechanism of absorption of these essential elements. It also helps you to introduce yourself briefly to the significance and the mechanism of biological nitrogen fixation.
Leghaemoglobin helps in,
Protecting nitrogenase from O2
Destroys bacteria
Transport of food in plants
Nitrogen fixation
The process of conversion of NO2– to N2 is called,
Nitrification
Ammonification
Denitrification
Nitrogen fixation
Function of zinc is,
Closing of stomata
Biosynthesis of 3-IAA
Synthesis of chlorophyll
Oxidation of carbohydrate
The formation of first stable product of nitrogen fixation is catalysed by enzyme,
Dehydrogenase
Nitrogenase
Isomerase
None of these
Which of the following is the correct set of micronutrients for plants?
Cu, Fe, Zn, B, Mn
Mo, Zn, Cl, Mg, Ca
Mg, Fe, Zn, B, Mn
Mg, Si, Fe, Cu, Ca
Which one of the following mineral elements plays an important role in biological nitrogen fixation ?
Molybdenum
Manganese
Copper
Zinc
‘Whip-tail’ disease in cauliflower is noted due to deficiency of,
Molybdenum
Manganese
Magnesium
Nitrogen
Manganese toxicity leads to deficiency of,
Iron
Calcium
Magnesium
All of the above
Which of the following is a group of micronutrients?
Ca, Zn, B
Fe, Mn, Cu
Cl, C, Ca
Ni, Mo, H
Which of the following elements will not cause delay flowering due to its less concentration?
K
Mo
S
N
Which element is located at the center of the porphyrin ring in chlorophyll?
Calcium
Potassium
Manganese
Magnesium
