The criteria for essentiality of an element for a plant include all except:
1. It must be absolutely necessary for supporting normal growth and reproduction
2. The requirement must be specific and not replaceable by another element
3. It must be directly involved in the metabolism of the plant.
4. They must be present in the plants in a concentration in excess of 10 mmole/Kg of dry matter.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich one of the following is not a nitrogen-fixing organism?
1. Anabaena
2. Nostoc
3. Azotobacter
4. Pseudomonas
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyHow many ATP molecules are required to biologically fix one molecule of nitrogen into two molecules of ammonia?
1. 4
2. 8
3. 12
4. 16
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhen the plants are grown in magnesium deficient but urea rich soil, the symptoms expressed are:
1. yellowish leaves
2. colourless petiole
3. dark green leaves
4. shoot apex die.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologySelect the mismatch.
(1) Frankia Alnus
(2) Rhodospirillium Mycorrhiza
(3) Anabaena Nitrogen fixer
(4) Rhizobium Alfa-fa
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich is essential for the growth of root tip?
(1) Zn
(2) Fe
(3) Ca
(4) Mn
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe oxygen evolved during photosynthesis comes from water molecules. Which one of the following pairs of elements involved in this reaction?
1. Manganese and chlorine
2. Manganese and potassium
3. Manganese and molybdenum
4. Magnesium and chlorine
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMinerals 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. magnessium, sulphur, iron, zinc
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyDeficiency symptoms of nitrogen and potassium are visible first in
1. senescent leaves
2. young leaves
3. roots
4. buds
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe most abundant intracellular cation is
1. Na+
2. Ca2+
3. H+
4. K+
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology