Manganese is required in:
1. nucleic acid synthesis
2. plant cell wall formation
3. photolysis of water during photosynthesis
4. chlorophyll synthesis

Subtopic:  Mineral Function |
 92%
From NCERT
AIPMT - 2009
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Nitrogen-fixation in root nodules of Alnus is brought about by:
1. Bradyrhizobium 2. Clostridium
3. Frankia 4. Azorhizobium
Subtopic:  Nitrogen Fixation | Genetics & Biochemistry of Nitrogen Fixation |
 94%
From NCERT
AIPMT - 2008
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Which of the following is a flowering plant with nodules containing filamentous nitrogen-fixing microorganism?

1. Casuarina equisetifolia

2. Crotolaria juncea

3. Cycas revoluta

4. Cicer arietinum

Subtopic:  Nitrogen Nutrition in Plants | Nitrogen Fixation |
AIPMT - 2007
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Which of the following is a non-symbiotic nitrogen fixer organism?

1. VAM

2. Azotobacter

3. Anabaena

4. Rhizobium

Subtopic:  Nitrogen Fixation |
 60%
From NCERT
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Which of the following is responsible for biological nitrogen fixation?

1. Nif gene

2. Nitrogenase

3. Both 1. and 2.

4. RNA synthetase

Subtopic:  Nitrogen Fixation |
 64%
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A plant requires magnesium (Mg) for:

1. holding cells together

2. protein synthesis

3. chlorophyll synthesis

4. cell wall development

Subtopic:  Mineral Function |
 80%
From NCERT
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Thiobacillus is a group of bacteria helpful in carrying out:

1. Denitrification

2. Nitrogen fixation

3. Chemoautotrophic fixation

4. Nitrification

Subtopic:  Nitrogen metabolism |
 85%
From NCERT
NEET - 2019
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The first stable product of fixation of atmospheric nitrogen in leguminous plants is:
1. Ammonia
2. Nitrite
3. Glutamate
4. NO2-
Subtopic:  Nodule formation |
 83%
AIPMT - 2013
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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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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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