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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Roots of which plant contains a pink pigment which have affinity for oxygen :
1.  Carrot
2.  Soyabean
3.  Mustard
4.  Radish

Subtopic:  Nodule formation |
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Cytochrome is : -
1.  Metallo flavo protein
2.  Fe containing porphyrin pigment
3.  Glycoprotein
4.  Lipid

Subtopic:  Mineral Function |
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Enzyme first used for nitrogen fixation : -
1.  Nitrogenase
2.  Nitroreductase
3.  Transferase
4.  Transaminase

Subtopic:  Nitrogen Fixation |
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Boron in green plants assists in : -
1. Activation of enzymes
2. Acting of enzyme cofactor
3. Photosynthesis
4. Sugar transport

Subtopic:  Mineral Function |
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Which one of the following mineral elements plays an important role in biological nitrogen fixation : -
1. Copper
2. Manganese
3. Zinc
4. Molybdenum

Subtopic:  Mineral Function |
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Which element is located at the center of the porphyrin ring in chlorophyll?

1. Calcium

2. Magnesium

3.  Potassium

4. Manganese

Subtopic:  Mineral Function |
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The major role of minor elements inside living organisms is to act as : -
1. co-factors of enzymes
2. Building blocks of important amino acids
3. Constituent of hormones
4. Binder of cell structure

Subtopic:  Mineral Function |
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Plants take zinc in the form of :

1. ZnSO4 2. Zn2+
3. ZnO 4. Zn
Subtopic:  Mineral Function |
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Nitrogen fixing bacteria converts :
1. N2  NH3
2. NH4+  Nitrates
3. NO2  NO3
4. NO3  N2

Subtopic:  Nitrogen Fixation |
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