An element playing important role in nitrogen fixation is
1. molybdenum
2. copper
3. manganese
4. zinc
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich one of the following is not a micronutrient?
1. Molybdenum
2. Magnesium
3. Zinc
4. Boron
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe free-living, anaerobic nitrogen-fixer is
1. Beijerinckia
2. Rhodospirillum
3. Rhizobium
4. Azotobacter
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe common nitrogen-fixer in paddy fields is
1. Rhizobium
2. Azospirillum
3. Oscillatoria
4. Frankia
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of the folowing is a symbiotic nitrogen fixer?
1. Glomus
2. Azotobacter
3. Frankia
4. Azolla
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAbout 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich one of the following elements is not an essential micronutrient for plant growth?
1. Mn
2. Zn
3. Cu
4. Ca
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA plant requires magnesium for
1. holding cells together
2. protein synthesis
3. chlorophyll synthesis
4. cell wall development
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyFarmers in a particular region were concerned that pre-mature yellowing of leaves of a pulse crop might cause 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 palnts with cytokinins alongwith 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 synthesis of chlorophyll
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologySulphur is an important nutrient for optimum growth and productivity in:
1. pulse crops
2. cereals
3. fibre crops
4. oilseed crops
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology