Deficiency symptoms of nitrogen and potassium are visible first in
1. senescent leaves
2. young leaves
3. roots
4. buds
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe most abundant intracellular cation is
1. Na+
2. Ca2+
3. H+
4. K+
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe first stable product of fixation of atmospheric nitrogen in leguminous plants is
1.
2. ammonia
3.
4. glutamate
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyBest defined function of manganese in green plants is
1. photolysis of water
2. Calvin cycle
3. nitrogen fixation
4. water absorption
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich one of the following is wrong statement?
1. Anabaena and Nostoc are capable of fixing nitrogen in free-living state also
2. Root nodule forming nirogen fixers live as aerobes under free-living conditions
3. Phosphorus is a constituent of cell membranes, certain nucleic acids and all proteins
4. Nitrosomonas and Nitrobacter are chemoautotrophs
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA nitrogen fixing microbe associated with Azolla in rice fields is
1. Spirulina
2. Anabaena
3. Frankia
4. Tolypothrix
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe function of leghaemoglobin in the root nodules of legumes is
(1) oxygen removal
(2) nodule differentiation
(3) expression of nif gene
(4) inhibition of nitrogenase activity
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyNitrifying bacteria
1. convert free nitrogen to nitrogen compounds
2. convert proteins into ammonia
3. reduce nitrates to free nitrogen
4. oxidize ammonia to nitrates
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAn organism used as a biofertilizer for raising soyabean crop is
1. Azospirillum
2. Rhizobium
3. Nostoc
4. Azotobacter
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAn element playing important role in nitrogen fixation is
1. molybdenum
2. copper
3. manganese
4. zinc
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology