Which of the following elements is responsible for maintaining turgor in cells?
1. Magnesium
2. Sodium
3. Potassium
4. Calcium

Subtopic:  Mineral Function |
 84%
From NCERT
NEET - 2018
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In which of the following, all three are macronutrients?
1. Iron, copper, molybdenum
2. Molybdenum, magnesium, manganese
3. Nitrogen, zinc, manganese
4. Nitrogen, magnesium, phosphorus
Subtopic:  Classification of Nutrients |
 80%
From NCERT
NEET - 2016
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During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented by?

1. Leghaemoglobin

2. Xanthophylls

3. Carotene

4. Cytochrome

Subtopic:  Nodule formation |
 93%
From NCERT
NEET - 2015
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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 |
 82%
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
AIPMT - 2014
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The most abundant intracellular cation is:
1. Ca2+
2. H+
3. K+
4. Na+

Subtopic:  Mineral Function |
 66%
From NCERT
AIPMT - 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 |
 89%
From NCERT
AIPMT - 2012
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An element playing important role in nitrogen fixation is:

1. molybdenum

2. copper

3. manganese

4. zinc

Subtopic:  Mineral Function |
 81%
From NCERT
AIPMT - 2010
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The function of leghemoglobin in the root nodules of legumes is:
1. oxygen removal
2. nodule differentiation
3. expression of nif gene
4. inhibition of nitrogenase activity

Subtopic:  Nodule formation |
 86%
From NCERT
AIPMT - 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 |
 58%
From NCERT
AIPMT - 2011
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