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%
From NCERT
AIPMT - 2010
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

Leguminous plants are able to fix atmospheric nitrogen through the process of symbiotic nitrogen fixation. Which one of the following statements is not correct during this process of nitrogen fixation:
 

1. Nodules act as sites for nitrogen fixation
2. The enzyme nitrogenase catalyses the conversion of atmospheric N2 to NH3
3. Nitrogenase is insensitive to oxygen
4. Leghaemoglobin scavenges oxygen and is pinkish in colour
Subtopic:  Nodule formation |
 80%
From NCERT
AIPMT - 2010
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

Which one of the following is essential for the photolysis of water?
1. Boron
2. Manganese
3. Zinc
4. Copper

Subtopic:  Mineral Function |
 96%
From NCERT
AIPMT - 2011
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Which one of the following is not an essential mineral element for plants while the remaining three are?
1. Phosphorus
2. Iron
3. Manganese
4. Cadmium

Subtopic:  Classification of Nutrients |
 91%
From NCERT
AIPMT - 2011
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NEET 2023 - Target Batch - Aryan Raj Singh
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Read the following four statements (I-IV):

I. Both, photophosphorylation and oxidative phosphorylation involve uphill transport of protons across the
membrane
II. In dicot stems, a new cambium originates from cells of pericycle at the time of secondary growth
III. Stamens in flowers of Gloriosa and Petunia are polyandrous
IV. Symbiotic nitrogen-fixers occur in a free-living state and also in soil


How many of the above statements are right?

1.  Three 

2. Four 

3. One 

4. Two 

Subtopic:  Nitrogen Fixation | Nodule formation |
AIPMT - 2012
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NEET 2023 - Target Batch - Aryan Raj Singh
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For its action, nitrogenase requires:
1.  Light
2.  Mn2+
3.  Super oxygen radicals
4.  High input of energy

Subtopic:  Nodule formation |
 56%
From NCERT
AIPMT - 2012
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

Which of the following elements is a constituent of biotin?
1. Magnesium
2. Calcium
3. Phosphorus
4. Sulphur
Subtopic:  Mineral Function |
From NCERT
NEET - 2013
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Which two distinct microbial processes are responsible for the release of fixed nitrogen as dinitrogen gas (N2) to the atmosphere?
 
1. Aerobic nitrate oxidation, and nitrite reduction
2. Decomposition of organic nitrogen, and conversion of dinitrogen to ammonium compounds
3. Enteric fermentation in cattle, and nitrogen fixation by Rhizobium in root nodules of legumes
4. Anaerobic ammonium oxidation, and denitrification

 
Subtopic:  Nitrogen Fixation | Nitrogen Metabolism |
 57%
From NCERT
NEET - 2013
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Sulphur is an important nutrient for optimum growth and productivity in:

1. pulse crops

2. cereals

3. fibre crops

4. oilseed crops

Subtopic:  Mineral Function |
AIPMT - 2006
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Farmers in a particular region were concerned that pre-mature yellowing of leaves of a pulse crop might cause a decrease in the yield. Which treatment could be most beneficial to obtain maximum seed yield?

1. Frequent irrigation of the crop
2. Treatment of the paints with cytokinins along with a small dose of nitrogenous fertilizer
3. Removal of all yellow leaves and spraying the remaining green leaves with 2,4,5-trichlorophenoxy acetic acid
4. Application of iron and magnesium to promote the synthesis of chlorophyll

Subtopic:  Mineral Function |
 65%
From NCERT
AIPMT - 2006
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh