Match Column-I with Column- II.

Column I Column II
(a) Nitrococcus
(b) Rhizobium
(c) Thiobacillus
(a) Nitrobactèr
(i) Denitrification
(ii) Conversion of ammonia to nitrite
(iii) Conversion of nitrite to nitrate
(iv) Conversion of atmospheric nitrogen to ammonia

Choose the correct answer from the options given below.

    (a) (b) (c) (d)

1. (iii) (i) (iv) (ii)

2. (iv) (iii) (ii) (i)

3. (ii) (iv) (i) (iii)

4. (i) (ii) (iii) (iv)

Subtopic:  Nitrogen Fixation |
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In Glycine max, the product of biological nitrogen fixation is transported from the root nodules to other parts as:

1. Ammonia

2. Glutamate

3. Nitrates

4. Ureides

Subtopic:  Ammonia Assimilation & Nitrogen Export |
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Which of the following elements helps in maintaining the structure of ribosomes?

1. Magnesium

2. Zinc

3. Copper

4. Molybdenum

Subtopic:  Mineral Function |
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Thiobacillus is a group of bacteria helpful in carrying out:

1. Denitrification

2. Nitrogen fixation

3. Chemoautotrophic fixation

4. Nitrification

Subtopic:  Nitrogen Metabolism: 1 | Nitrogen Metabolism:2 | Nitrogen metabolism | Nitrogen Metabolism |
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Which of the following bacteria reduce nitrate in soil into nitrogen ?

1. Nitrobacter

2. Thiobacillus

3. Nitrococcus

4. Nitrosomonas

Subtopic:  Nitrogen Fixation |
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In which of the following forms is iron absorbed by plants?

1. Ferric
2. Ferrous
3. Free element
4. Both ferric and ferrous

Subtopic:  Mineral Function |
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Which of the following elements is responsible for maintaining turgor in cells ?
1. Magnesium
2. Sodium
3. Potassium
4. Calcium

 

Subtopic:  Mineral Function |
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Select the mismatch:

1. Rhodospirillum - Mycorrhiza

2. Anabaena - Nitrogen fixer

3. Rhizobium - Alfalfa

4. Frankia - Alnus

Subtopic:  Nitrogen Fixation |
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In which of the following, all three are macronutrients?
1. Iron, copper, molybdenum
2. Molybdenum, magnesium, manganese
3. Nitrogen, zinc, manganese
4. Nitrogen, magnesium, phosphorus
Subtopic:  Classification of Nutrients |
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During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented by

1. Leghaemoglobin

2. Xanthophylls

3. Carotene

4. Cytochrome

Subtopic:  Nodule formation |
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