Minerals known to be required in large amounts for plant growth include

1. Phosphorus, potassium, sulphur, calcium

2. calcium, magnesium, manganese, copper

3. potassium, phosphorus, selenium, boron

4. magnesium, sulphur, iron, zinc

Subtopic:  Classification of Nutrients |
 84%
From NCERT
NEET - 2015
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Deficiency symptoms of nitrogen and potassium are visible first in

1. senescent leaves

2. young leaves

3. roots

4. buds

Subtopic:  Mineral Deficiency & Toxicity |
 82%
From NCERT
NEET - 2014
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The most abundant intracellular cation is

1. Na+

2. Ca2+

3. H+

4. K+

Subtopic:  Mineral Function | Classification of Nutrients |
 63%
From NCERT
NEET - 2013
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The first stable product of fixation of atmospheric nitrogen in leguminous plants is

1. NO2-

2. ammonia

3. NO3-

4. glutamate

Subtopic:  Ammonia Assimilation & Nitrogen Export |
 72%
From NCERT
NEET - 2013
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Best defined function of manganese in green plants is

1. photolysis of water

2. Calvin cycle

3. nitrogen fixation

4. water absorption

Subtopic:  Mineral Function |
 88%
From NCERT
NEET - 2012
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Which one of the following is the wrong statement?

1. Anabaena and Nostoc are capable of fixing nitrogen in a free-living state also

2. Root nodule-forming nitrogen 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

Subtopic:  Nitrogen Fixation |
 53%
From NCERT
NEET - 2012
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A nitrogen fixing microbe associated with Azolla in rice fields is

1. Spirulina

2. Anabaena

3. Frankia

4. Tolypothrix

Subtopic:  Nitrogen Fixation |
 62%
From NCERT
NEET - 2012
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The 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

Subtopic:  Nitrogen Fixation | Nodule formation |
 84%
From NCERT
NEET - 2011
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Nitrifying bacteria

1. convert free nitrogen to nitrogen compounds

2. convert proteins into ammonia

3. reduce nitrates to free nitrogen

4. oxidize ammonia to nitrates

Subtopic:  Nitrogen Fixation |
 61%
From NCERT
NEET - 2011
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An organism used as a biofertilizer for raising soyabean crop is

1. Azospirillum

2. Rhizobium

3. Nostoc

4. Azotobacter

Subtopic:  Nitrogen Fixation |
 67%
From NCERT
NEET - 2011
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