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Q. No.Match each item in COLUMN I with one in COLUMN II and select the correct match from the codes given:
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 |
90%
From NCERT
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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 |
89%
From NCERT
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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 |
80%
From NCERT
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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 |
From NCERT
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Molybdenum is a component of:
I. Nitrogenase
II. Nitrate reductase
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
I. Nitrogenase
II. Nitrate reductase
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
Subtopic: Mineral Function |
75%
From NCERT
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Consider the two statements:
| I: | Deficiency symptoms of nitrogen, potassium and magnesium are visible first in the senescent leaves. |
| II: | These elements are a part of the structural component of the cell and hence are not easily released. |
| 1. | Both I and II are correct and II explains I |
| 2. | Both I and II are correct but II does not explain I |
| 3. | I is correct and II is incorrect |
| 4. | I is incorrect and II is correct |
Subtopic: Mineral Deficiency & Toxicity |
71%
From NCERT
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Consider the two statements:
Statement I: Excess of manganese in higher plants may induce deficiency of iron.
Statement II: Manganese inhibits translocation of iron at apex.
1. Both Statement I and Statement II are correct and Statement II explains Statement I
2. Both Statement I and Statement II are correct but Statement II does not explain Statement I
3. Statement I is correct and Statement II is incorrect
4. Statement I is incorrect and Statement II is correct
Statement I: Excess of manganese in higher plants may induce deficiency of iron.
Statement II: Manganese inhibits translocation of iron at apex.
1. Both Statement I and Statement II are correct and Statement II explains Statement I
2. Both Statement I and Statement II are correct but Statement II does not explain Statement I
3. Statement I is correct and Statement II is incorrect
4. Statement I is incorrect and Statement II is correct
Subtopic: Mineral Deficiency & Toxicity |
62%
From NCERT
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Dentrification is carried out by:
1. Thiobacillus and Pseudomonas
2. Nitrosomanas and Nitrobacter
3. Rhodospirillum and Azotobacter
4. Beijerinckia and Frankia
1. Thiobacillus and Pseudomonas
2. Nitrosomanas and Nitrobacter
3. Rhodospirillum and Azotobacter
4. Beijerinckia and Frankia
Subtopic: Nitrogen metabolism |
93%
From NCERT
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Frankia fixes atmospheric nitrogen:
| 1. | in the roots of non-leguminous plants like Alnus but unlike Rhizobium does not form any root nodules |
| 2. | in the roots of leguminous plants like Soybean but unlike Rhizobium does not form any root nodules |
| 3. | in the roots of non-leguminous plants like Alnus and like Rhizobium forms root nodules |
| 4. | in the roots of leguminous plants like Soybean and like Rhizobium forms root nodules |
Subtopic: Nitrogen Fixation |
66%
From NCERT
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Identify the incorrect statement regarding the development of root nodules in soyabean:
1. Rhizobium bacteria contact a susceptible root hair, divide near it
2. Successful infection of the root hair causes it to curl
3. Infected thread carries the bacteria to the inner cortex, the bacteria get modified into rod-shaped bacteroids and cause inner cortical and pericycle cells to divide which leads to nodule formation
4. A mature nodule is complete without any vascular tissues continuous with those of the root.
Subtopic: Nodule formation |
73%
From NCERT
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