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Q. No.
Assertion(A): Excess of manganese induces a deficiency of iron, magnesium, and sulfur.
Reason(R): Manganese inhibits calcium translocation in the shoot apex.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic: Mineral Deficiency & Toxicity |
64%
Level 2: 60%+
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All the following elements required by higher plants are regarded as ‘beneficial’ except:
1. Sodium
2. Selenium
3. Cobalt
4. Nickel
1. Sodium
2. Selenium
3. Cobalt
4. Nickel
Subtopic: Criteria for Essentiality of Elements |
67%
Level 2: 60%+
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Ammonia synthesis by nitrogenase requires a very high input of energy which is:
| 1. | 4 ATP for each NH3 produced |
| 2. | 8 ATP for each NH3 produced |
| 3. | 12 ATP for each NH3 produced |
| 4. | 16 ATP for each NH3 produced |
Subtopic: Nodule formation |
85%
Level 1: 80%+
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Match each item in COLUMN I with one in Column II and select the correct match from the codes given:
Codes:
| Column I [Element] |
Column II [Role in plants] |
||
| A | Magnesium | P | Synthesis of auxin |
| B | Manganese | Q | Ribosome structure |
| C | Boron | R | Pollen germination |
| D | Zinc | S | Splitting of water |
| A | B | C | D | |
| 1. | Q | R | P | S |
| 2. | S | R | Q | P |
| 3. | Q | S | R | P |
| 4. | R | S | P | Q |
Subtopic: Mineral Function |
83%
Level 1: 80%+
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Nitrifying bacteria are:
1. chemoautotrophs
2. photoautotrophs
3. chemoheterotrophs
4. methanogens
1. chemoautotrophs
2. photoautotrophs
3. chemoheterotrophs
4. methanogens
Subtopic: Nitrogen metabolism |
78%
Level 2: 60%+
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In nitrogen cycle, the bacteria carrying out nitrification are:
1. Photosynthetic autotrophs
2. Chemoautotrophs
3. Chemoheterotrophs
4. Methanogens
1. Photosynthetic autotrophs
2. Chemoautotrophs
3. Chemoheterotrophs
4. Methanogens
Subtopic: Nitrogen metabolism |
83%
Level 1: 80%+
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Which essential mineral nutrient required by plants plays an important role in opening and closing of stomata?
1. Phosphorus
2. Potassium
3. Calcium
4. Magnesium
Subtopic: Mineral Function |
89%
Level 1: 80%+
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The main amino acid, from which the transfer of the amino group takes place and other amino acids are formed, is:
1. Glutamic acid
2. Aspartic acid
3. Tryptophan
4. Lysine
1. Glutamic acid
2. Aspartic acid
3. Tryptophan
4. Lysine
Subtopic: Nitrogen Fixation |
79%
Level 2: 60%+
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Nitrobacter:
1. Oxidises ammonia to nitrite
2. Reduces ammonia to nitrite
3. Oxidises nitrite to nitrate
4. Reduces nitrite to nitrate
1. Oxidises ammonia to nitrite
2. Reduces ammonia to nitrite
3. Oxidises nitrite to nitrate
4. Reduces nitrite to nitrate
Subtopic: Nitrogen Fixation |
71%
Level 2: 60%+
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Which micronutrient is required for splitting of water molecule during photosynthesis?
| 1. | Copper | 2. | Manganese |
| 3. | Molybdenum | 4. | Magnesium |
Subtopic: Mineral Function |
59%
Level 3: 35%-60%
NEET - 2023
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