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
Which of the following element helps in maintaining the structure of ribosomes?
1. Magnesium | 2. Zinc |
3. Copper | 4. Molybdenum |
Which of the following is a non–symbiotic nitrogen fixing bacteria?
1. Rhizobium
2. Mycorrhiza
3. Azotobacter
4. Nitrosomonas
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Nitrogen-fixing bacteria converts:
1.
2.
3.
4.
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Plants take zinc in the form of:
1. ZnSO4 | 2. Zn2+ |
3. ZnO | 4. Zn |
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Identify the incorrectly matched pair:
|
Nutrient element |
Function in plants |
1. |
Magnesium |
Maintenance of ribosome structure |
2. |
Sulfur |
Constituent of ferrodoxin |
3. |
Zinc |
Synthesis of gibberellins |
4. |
Boron |
Pollen germination |
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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
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Cytochrome is:
1. Metallo flavo protein
2. Fe containing porphyrin pigment
3. Glycoprotein
4. Lipid
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Roots of which plant contains a pink pigment that has an affinity for oxygen:
1. Carrot
2. Soyabean
3. Mustard
4. Radish
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For each molecule of ammonia produced during biological nitrogen fixation, the number of ATP molecules required is:
1. 4
2. 8
3. 12
4. 16
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