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Q. No.In a root nodule, the gene coding for nitrogenase
1. is inactivated by leghemoglobin.
2. is absent in active bacteroids.
3. is found in the cells of the pericycle.
4. is part of the Rhizobium genome
Subtopic: Nodule formation |
50%
Level 3: 35%-60%
Please attempt this question first.
Hints
Match List I with List II:
Choose the correct answer from the options given below:
1. A-IV, B-III, C-I, D-II
2. A-II, B-I, C-IV, D-III
3. A-II, B-III, C-IV, D-I
4. A-IV, B-III, C-II, D-I
| List I | List II | ||
| A. | Manganese | I. | Pollen germination |
| B. | Potassium | II. | Chlorosis in older leaves |
| C. | Magnesium | III. | Necrosis |
| D. | Boron | IV. | Photosynthesis |
Choose the correct answer from the options given below:
1. A-IV, B-III, C-I, D-II
2. A-II, B-I, C-IV, D-III
3. A-II, B-III, C-IV, D-I
4. A-IV, B-III, C-II, D-I
Subtopic: Mineral Function |
52%
Level 3: 35%-60%
Hints
Match List I with List II:
Choose the correct answer from the options given below:
1. A -III, B - IV, C-II, D - I
2. A -II, B - I, C-IV, D - III
3. A -II , B - IV, C-I, D - III
4. A -IV , B - II , C-III, D - I
| List-I | List-II | ||
| A. | Nitrification | I. | Azotobacter |
| B. | Denitrification | II. | Nitrotobacter |
| C. | Free-living nitrogen fixation | III. | Rhizobium |
| D. | Symbiotic nitrogen fixation | IV. | Pseudomonas |
Choose the correct answer from the options given below:
1. A -III, B - IV, C-II, D - I
2. A -II, B - I, C-IV, D - III
3. A -II , B - IV, C-I, D - III
4. A -IV , B - II , C-III, D - I
Subtopic: Nitrogen Fixation | Nitrogen Metabolism |
84%
Level 1: 80%+
Hints
In root nodules of legumes, leg-haemoglobin is important because it:
1. Facilitates oxygen supply to the root nodule
2. Protects nitrogenase enzymes from denaturation
3. Provides energy to the nitrogen fixing bacterium
4. Acts as a catalyst in transamination
1. Facilitates oxygen supply to the root nodule
2. Protects nitrogenase enzymes from denaturation
3. Provides energy to the nitrogen fixing bacterium
4. Acts as a catalyst in transamination
Subtopic: Nitrogen Fixation | Nodule formation |
79%
Level 2: 60%+
Please attempt this question first.
Hints
Please attempt this question first.
Match List I with List II
Choose the correct answer from the options given below
1. A-IV, B-I, C-III, D-II
2. A-II, B-I, C-III, D-IV
3. A-II, B-III, C-I, D-IV
4. A-III, B-II, C-IV, D-I
| List I | List II |
| A. Boron | I. Splitting of water during photosynthesis |
| B. Manganese | II. Synthesis of auxin |
| C. Molybdenum | III. Component of nitrogenase |
| D. Zinc | IV. Pollen germination |
Choose the correct answer from the options given below
1. A-IV, B-I, C-III, D-II
2. A-II, B-I, C-III, D-IV
3. A-II, B-III, C-I, D-IV
4. A-III, B-II, C-IV, D-I
Subtopic: Mineral Function |
90%
Level 1: 80%+
Hints
Which of the following is not a ‘beneficial’ element required by higher plants?
1. Sodium
2. Silicon
3. Cobalt
4. Nickel
1. Sodium
2. Silicon
3. Cobalt
4. Nickel
Subtopic: Classification of Nutrients |
73%
Level 2: 60%+
Hints
Match each item in COLUMN I with one in COLUMN II and select the correct match from the codes given:
Codes:
| COLUMN I | COLUMN II | ||
| A | Elements that are components of biomolecules | P | C, H, O, N |
| B | Elements that are components of energy – related chemical compounds | Q | Mg, P |
| C | Elements that activate or inhibit enzymes | R | Zn, Mo, Mg |
| D | Elements that can alter the osmotic potential of the soil | S | K |
Codes:
| A | B | C | D | |
| 1. | P | Q | R | S |
| 2. | Q | R | S | P |
| 3. | R | S | P | Q |
| 4. | S | R | Q | P |
Subtopic: Mineral Function |
88%
Level 1: 80%+
Hints
Which essential element is important for the opening and closing of stomata in higher plants?
1. Calcium
2. Sodium
3. Potassium
4. Phosphorus
1. Calcium
2. Sodium
3. Potassium
4. Phosphorus
Subtopic: Mineral Function |
78%
Level 2: 60%+
Hints
The essential element, Calcium, is required by the higher plants for:
I. Synthesis of cell wall
II. Formation of mitotic spindle
III. Normal functioning of the cell membranes
1. I and II only
2. I and III only
3. II and III only
4. I, II and III
I. Synthesis of cell wall
II. Formation of mitotic spindle
III. Normal functioning of the cell membranes
1. I and II only
2. I and III only
3. II and III only
4. I, II and III
Subtopic: Mineral Function |
79%
Level 2: 60%+
Hints
Iron in plants:
I. is mainly obtained in the form of ferric ions.
II. is reversibly reduced from Fe3+ to Fe2+ during electron transfer.
III. inactivates catalase enzyme.
1. Only I is correct
2. Both I and II are incorrect
3. Only III is incorrect
4. I, II and III are correct
I. is mainly obtained in the form of ferric ions.
II. is reversibly reduced from Fe3+ to Fe2+ during electron transfer.
III. inactivates catalase enzyme.
1. Only I is correct
2. Both I and II are incorrect
3. Only III is incorrect
4. I, II and III are correct
Subtopic: Mineral Function |
Level 3: 35%-60%
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