Nitrogenase needs which of the following ion for activation?
(1) Cr
(2) Mo
(3) W
(4) Sg
For the opening and closing of stomata which of the following ion is important?
(1) Ca++
(2) Mo
(3) Cr
(4) K+
Alcohol Dehydrogenase needs which of the following ion for activation?
(1) Zn++
(2) Mo
(3) Cr
(4) Mg++
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.
Phosphoenol pyruvate carboxylase needs which of the following ions for activation?
(1) Zn++
(2) Mg++
(3) Mn++
(4) Ca++
Which of the following act as an activator for ribulose bisphoshate carboxylase oxygenase?
(1) Zn++
(2) Mg++
(3) Mn+
(4) Ca++
The total essential elements for plant are
(1) 20
(2) 17
(3) 24
(4) 15
The beneficial elements are
(1) Required by higher plants
(2) Na,Si,Co,Se
(3) Other than 17 essential elements
(4) All of these
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
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