Cytochrome is                          [2001]

1. Metallo flavoproteins

2. Fe containing porphyrin pigment

3. Glycoprotein

4. Lipid 

Subtopic:  Mineral Function |
 73%
From NCERT
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Consider the following:

I Facilitation of uptake and utilization of calcium by plants
II. Cell elongation and cell differentiation
III. Nitrogen metabolism
IV. Carbohydrate translocation
V. Water splitting reaction in photosynthesis

The functions of Boron in plants will include:

1. I,II, III, IV

2. I, II, IV

3. II, III, IV

4. I, III, V

Subtopic:  Mineral Function | Nitrogen Metabolism: 1 | Nitrogen metabolism |
 69%
From NCERT
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Identify a micronutrient for plants amongst the following:
1. Potassium
2. Phosphorus
3. Iron
4. Sulphur

Subtopic:  Classification of Nutrients |
 85%
From NCERT
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Which element is required by the plants for uptake and utilization of calcium and carbohydrate translocation ?

1. Manganese
2. Boron
3. Chlorine
4. Selenium

Subtopic:  Mineral Function |
 86%
From NCERT
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During nitrogen fixation, nitrite is oxidized to nitrate with the help of the bacterium:

1. Nitrosomanas
2. Pseudomonas
3. Nitrobacter
4. Thiobacillus

 

Subtopic:  Nitrogen Fixation | Genetics & Biochemistry of Nitrogen Fixation |
 72%
From NCERT
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Nitrogen-fixing nodules on the roots of non-leguminous plants like Alnus are produced by
1. Rhizobium
2. Beijernickia
3. Azotobacter
4. Frankia

Subtopic:  Nitrogen Fixation |
 80%
From NCERT
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For each molecule of ammonia produced by nitrogenase, the number of ATP molecules required are:
1. 4
2. 8
3. 12
4. 16

Subtopic:  Nitrogen Fixation | Ammonia Assimilation & Nitrogen Export |
 76%
From NCERT
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The deficiency symptoms of iron, magnesium and calcium in plants may actually be due to the toxicity of
1. Potassium
2. Manganese
3. Iron
4. Chlorine

Subtopic:  Mineral Deficiency & Toxicity |
 88%
From NCERT
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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.

Subtopic:  Criteria for Essentiality of Elements |
 88%
From NCERT
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Which one of the following is not a nitrogen-fixing organism?

1. Anabaena

2. Nostoc

3. Azotobacter

4. Pseudomonas

Subtopic:  Nitrogen Fixation |
 83%
From NCERT
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