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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The product(s) of the reaction catalyzed by nitrogenase in root nodules of leguminous plants is/are.

1. Nitrate alone

2. Ammonia and oxygen

3. Ammonia and hydrogen

4. Ammonia alone

Subtopic:  Nitrogen Metabolism: 1 | Nitrogen metabolism |
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Match the following concerning essential elements and their functions in plants :

(a) Iron            (i) Photolysis of water

(b) Zinc           (ii) Pollen germination

(c) Boron         (iii) Required for chlorophyll biosynthesis

(d) Manganese  (iv) IAA biosynthesis

Select the correct option:

     (a)  (b)  (c)  (d)

1.  (iv) (iii)  (ii)  (i)

2.  (iii)  (iv) (ii)  (i)

3.  (iv)  (i)  (ii)  (iii)

4.  (ii)   (i)  (iv)  (iii)

Subtopic:  Mineral Function |
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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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Match List - I with List - II
List I List II
(a) Manganese (i) Activates the enzyme catalase
(b) Magnesium (ii) Required for pollen germination
(c) Boron (iii) Activates enzymes of respiration
(d) Iron (iv) Functions in splitting of water during photosynthesis
Choose the correct answer from the options given below:
(a) (b) (c) (d)
1. (iii) (i) (ii) (iv)
2. (iii) (iv) (i) (ii)
3. (iv) (iii) (ii) (i)
4. (iv) (i) (ii) (iii)
Subtopic:  Mineral Function |
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Which one of the following produces nitrogen fixing nodules on the roots of Alnus ??
1. Beijernickia
2. Rhizobium
3. Frankia
4. Rhodospirillum
Subtopic:  Genetics & Biochemistry of Nitrogen Fixation |
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Which one of the following process is responsible for the release of \(N_2\) in the atmosphere? 
1. Industrial Nitrogen fixation 
2. Ammonification 
3. Denitrification 
4. Biological nitrogen fixation 

Subtopic:  Nitrogen Metabolism |
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