Cytochrome is                          [2001]

1. Metallo flavoproteins

2. Fe containing porphyrin pigment

3. Glycoprotein

4. Lipid 

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

Identify a micronutrient for plants amongst the following:
1. Potassium
2. Phosphorus
3. Iron
4. Sulphur

Which element is required by the plants for uptake and utilization of calcium and carbohydrate translocation ?

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

During nitrogen fixation, nitrite is oxidized to nitrate with the help of the bacterium:

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

Nitrogen-fixing nodules on the roots of non-leguminous plants like Alnus are produced by
1. Rhizobium
2. Beijernickia
3. Azotobacter
4. Frankia

For each molecule of ammonia produced by nitrogenase, the number of ATP molecules required are:
1. 4
2. 8
3. 12
4. 16

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

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.

Which one of the following is not a nitrogen-fixing organism?

1. Anabaena

2. Nostoc

3. Azotobacter

4. Pseudomonas