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Q. No.Match Column-I with Column- II.
Column I
Column II
(a)
Nitrococcus
(i)
Denitrification
(b)
Rhizobium
(ii)
Conversion of ammonia to nitrite
(c)
Thiobacillus
(iii)
Conversion of nitrite to nitrate
(d)
Nitrobactèr
(iv)
Conversion of atmospheric nitrogen to ammonia
Choose the correct answer from the options given below:
Options:
(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 |
79%
Level 2: 60%+
NEET - 2021
Hints
Study the cycle shown below and select the option which gives the correct words for all four blanks A, B, C, and D:
Options:
| A | B | C | D | |
| 1. | Denitrification | Ammonification | Plants | Animals |
| 2. | Nitrification | Denitrification | Animals | Plants |
| 3. | Denitrification | Nitrification | Plants | Animals |
| 4. | Nitrification | Ammonification | Animals | Plants |
Subtopic: Nitrogen Fixation |
81%
Level 1: 80%+
AIPMT - 2010
Hints
Which of the following elements helps in maintaining the structure of ribosomes?
1. Magnesium
2. Zinc
3. Copper
4. Molybdenum
Subtopic: Mineral Function |
82%
Level 1: 80%+
NEET - 2020
Hints
In Glycine max, the product of biological nitrogen fixation is transported from the root nodules to other parts as:
1. Ammonia
2. Glutamate
3. Nitrates
4. Ureides
Subtopic: Ammonia Assimilation & Nitrogen Export |
53%
Level 3: 35%-60%
NEET - 2020
Hints
Biological nitrogen fixation directly results in the formation of:
1. Ammonium ions
2. Nitrate ions
3. Nitrite ions
4. Ammonia
1. Ammonium ions
2. Nitrate ions
3. Nitrite ions
4. Ammonia
Subtopic: Nitrogen Fixation |
67%
Level 2: 60%+
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Hints
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Calcium:
1. is a micronutrient for plants
2. is a constituent of cell membranes
3. is involved in opening and closing of stomata directly
4. is used in synthesis of middle lamella
1. is a micronutrient for plants
2. is a constituent of cell membranes
3. is involved in opening and closing of stomata directly
4. is used in synthesis of middle lamella
Subtopic: Mineral Function |
84%
Level 1: 80%+
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To be considered as ‘toxic’, the mineral ion concentration in plants should reduce the dry weight of tissues by about:
1. 1 %
2. 2 %
3. 5 %
4. 10 %
1. 1 %
2. 2 %
3. 5 %
4. 10 %
Subtopic: Mineral Deficiency & Toxicity |
87%
Level 1: 80%+
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Regarding diazotrophs [biological nitrogen fixers]:
1. Frankia produces nitrogen-fixing nodules on the roots of non-leguminous plants
2. Azotobacter and Beijerinckia fix atmospheric nitrogen only as symbionts
3. Rhodospirillum is aerobic
4. No cyanobacteria are diazotrophs
1. Frankia produces nitrogen-fixing nodules on the roots of non-leguminous plants
2. Azotobacter and Beijerinckia fix atmospheric nitrogen only as symbionts
3. Rhodospirillum is aerobic
4. No cyanobacteria are diazotrophs
Subtopic: Nitrogen Fixation |
77%
Level 2: 60%+
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For plants the elements such as sodium, cobalt, silicon and selenium be best described as:
1. Beneficial elements
2. Toxic elements
3. Trace elements
4. Macronutrient elements
1. Beneficial elements
2. Toxic elements
3. Trace elements
4. Macronutrient elements
Subtopic: Criteria for Essentiality of Elements | Classification of Nutrients |
81%
Level 1: 80%+
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Bacteria capable of carrying out reduction of nitrate present in the soil include:
1. Pseudomonas and Thiobacillus
2. Nitrosomanas and Nitrobacter
3. Nitrococcus and Nitrococcus
4. Rhizobium and Bradyrhizobium
1. Pseudomonas and Thiobacillus
2. Nitrosomanas and Nitrobacter
3. Nitrococcus and Nitrococcus
4. Rhizobium and Bradyrhizobium
Subtopic: Nitrogen metabolism |
67%
Level 2: 60%+
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