Nitrogenase needs which of the following ion for activation?

(1) Cr

(2) Mo

(3) W

(4) Sg

Subtopic:  Criteria for Essentiality of Elements |
 96%
From NCERT
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For the opening and closing of stomata which of the following ion is important?

(1) Ca++

(2) Mo

(3) Cr

(4) K+

Subtopic:  Criteria for Essentiality of Elements |
 93%
From NCERT
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Alcohol Dehydrogenase needs which of the following ion for activation?

(1) Zn++

(2) Mo

(3) Cr

(4) Mg++

Subtopic:  Criteria for Essentiality of Elements |
 87%
From NCERT
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The criteria for essentiality of an element for a plant include all except:
1. It must be absolutely necessary for supporting normal growth and reproduction
2. The requirement must be specific and not replaceable by another element
3. It must be directly involved in the metabolism of the plant.
4. They must be present in the plants in a concentration in excess of 10 mmole/Kg of dry matter.

Subtopic:  Criteria for Essentiality of Elements |
 88%
From NCERT
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Phosphoenol pyruvate carboxylase needs which of the following ions for activation?

(1) Zn++

(2) Mg++

(3) Mn++

(4) Ca++

Subtopic:  Criteria for Essentiality of Elements |
 83%
From NCERT
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Which of the following act as an activator for ribulose bisphoshate carboxylase oxygenase?

(1) Zn++

(2) Mg++

(3) Mn+

(4) Ca++

Subtopic:  Criteria for Essentiality of Elements |
 87%
From NCERT
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The total essential elements for plant are

(1) 20

(2) 17

(3) 24

(4) 15

Subtopic:  Criteria for Essentiality of Elements |
 85%
From NCERT
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The beneficial elements are

(1) Required by higher plants

(2) Na,Si,Co,Se

(3) Other than 17 essential elements

(4) All of these

Subtopic:  Criteria for Essentiality of Elements |
 77%
From NCERT
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Which of the following is not a component of biomolecule is not contribute in structural elements of cell?

(1) C

(2) O

(3) N

(4) Mg

Subtopic:  Criteria for Essentiality of Elements |
 79%
From NCERT
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Which of the following is not a component of  energy related chemical compound in plant?

(1) Magnesium in chlorophyll

(2) Phosphorus in ATP

(3) Carbon in DNA

(4) Both 1 and 2

Subtopic:  Criteria for Essentiality of Elements |
 71%
From NCERT
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