An element playing important role in nitrogen fixation is

1. molybdenum

2. copper

3. manganese

4. zinc

Subtopic:  Nitrogen Fixation |
 77%
From NCERT
NEET - 2010
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Which one of the following is not a micronutrient?

1. Molybdenum

2. Magnesium

3. Zinc

4. Boron

Subtopic:  Classification of Nutrients |
 86%
From NCERT
NEET - 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
NEET - 2010
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The common nitrogen-fixer in paddy fields is

1. Rhizobium

2. Azospirillum

3. Oscillatoria

4. Frankia

Subtopic:  Nitrogen Fixation |
NEET - 2010
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Which of the following is a symbiotic nitrogen fixer?

1. Glomus

2. Azotobacter

3. Frankia

4. Azolla

Subtopic:  Nitrogen Fixation |
 65%
From NCERT
NEET - 2009
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About 98 percent of the mass of every living organism is composed of just six elements

including carbon, hydrogen, nitrogen, oxygen and:

1. phosphorus and sulphur

2. sulphur and magnesium

3. magnesium and sodium

4. calcium and phosphorus

Subtopic:  Mineral Function |
 57%
NEET - 2007
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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 |
 68%
From NCERT
NEET - 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 |
 84%
From NCERT
NEET - 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 plants 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 trichloro phenoxy acetic acid

4. Application of iron and magnesium to promote the synthesis of chlorophyll

Subtopic:  Mineral Function |
 77%
From NCERT
NEET - 2006
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Sulphur is an important nutrient for optimum growth and productivity in:

1. pulse crops

2. cereals

3. fibre crops

4. oilseed crops

Subtopic:  Mineral Function |
NEET - 2006
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