Which one of the following is not a micronutrient?

1. Molybdenum

2. Magnesium

3. Zinc

4. Boron

Subtopic:  Classification of Nutrients |
 85%
From NCERT
AIPMT - 2010
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The free-living, anaerobic nitrogen-fixer is:

1. Beijerinckia

2. Rhodospirillum

3. Rhizobium

4. Azotobacter

Subtopic:  Nitrogen Fixation |
 73%
From NCERT
AIPMT - 2010
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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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Which of the following is a symbiotic nitrogen fixer?
1. Glomus
2. Azotobacter
3. Frankia
4. Azolla

Subtopic:  Nitrogen Fixation | Genetics & Biochemistry of Nitrogen Fixation |
 71%
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 one of the following elements is not an essential micronutrient for plant growth?
1. Mn
2. Zn
3. Cu
4. Ca

Subtopic:  Classification of Nutrients |
 70%
From NCERT
AIPMT - 2007
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A plant requires magnesium for:

1. holding cells together

2. protein synthesis

3. chlorophyll synthesis

4. cell wall development

Subtopic:  Mineral Function |
 85%
From NCERT
AIPMT - 2007
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Farmers in a particular region were concerned that pre-mature yellowing of leaves of a pulse crop might cause a decrease in the yield. Which treatment could be most beneficial to obtain maximum seed yield?

1. Frequent irrigation of the crop
2. Treatment of the paints with cytokinins along with a small dose of nitrogenous fertilizer
3. Removal of all yellow leaves and spraying the remaining green leaves with 2,4,5-trichlorophenoxy acetic acid
4. Application of iron and magnesium to promote the synthesis of chlorophyll

Subtopic:  Mineral Function |
 65%
From NCERT
AIPMT - 2006
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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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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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