An aquatic fern that is used to increase the yield of paddy crops:

1. Azolla

2. Salvinia

3. Marsilea

4. Isoetes

Subtopic:  Nitrogen Fixation |
 85%
AIPMT - 2000
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Hints

The major role of minor elements inside living organisms is to act as:
1. Co-factors of enzymes
2. Building blocks of important amino acids
3. Constituent of hormones
4. Binder of cell structure

Subtopic:  Mineral Function |
 67%
From NCERT
AIPMT - 2003
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

Which element is located at the center of the porphyrin ring in chlorophyll?

1.Calcium2.Magnesium
3.Potassium4.Manganese
Subtopic:  Mineral Function |
 90%
From NCERT
AIPMT - 2003
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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 mineral elements plays an important role in biological nitrogen fixation:
1. Copper
2. Manganese
3. Zinc
4. Molybdenum

Subtopic:  Mineral Function |
 82%
From NCERT
AIPMT - 2003
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

Plants deficient in the element zinc show its effect on the biosynthesis of which plant growth hormone:

1. Auxin 2. Cytokinin
3. Ethylene 4. Abscissic acid
Subtopic:  Mineral Deficiency & Toxicity |
 76%
From NCERT
AIPMT - 2003
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Hints
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In which one of the following nitrogen is not a constituent:

1. Idioblast

2. Bacteriochlorophyll

3. Invertase

4. Pepsin

Subtopic:  Mineral Function |
AIPMT - 2003
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Boron in green plants assists in:
1. Activation of enzymes
2. Acting of enzyme cofactor
3. Photosynthesis
4. Sugar transport

Subtopic:  Mineral Function |
 60%
From NCERT
AIPMT - 2003
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

Grey spots of oat are caused by deficiency of:

1. Cu

2. Zn

3. Mn

4. Fe

Subtopic:  Mineral Deficiency & Toxicity |
AIPMT - 2003
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Hints

What is the best pH of the soil for the cultivation of plants:
1.  3.4 – 5.4
2.  6.5 – 7.5
3.  4.5 – 8.5
4.  5.5 – 6.5

Subtopic:  Hydroponics & Aeroponics |
AIPMT - 2001
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Enzyme first used for nitrogen fixation:
1.  Nitrogenase
2.  Nitroreductase
3.  Transferase
4.  Transaminase

Subtopic:  Nitrogen Fixation |
 93%
From NCERT
AIPMT - 2001
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh