Which element play important role in opening and closing of stomata?
In how many broad categories can the essential elements be grouped on the basis of their diverse function?
Which essential nutrient in plant is required in greatest amount?
Nitrogen is one of the major constituents of
[B] nucleic acid
[C] vitamins and hormones
Select the incorrect match:
Element Absorbable form
[A] Nitrogen – NO–,NO–NH+
[B] Sulphur – S2-
[C] Iron – Fe3+ m, sup>
[D] Boron – BO33-, B4Of
Which is required for all phosphorylation reaction?
Which of the following is the function of potassium?
(1) Cation-anion balance in cell.
(2) Involved in protein synthesis.
(3) Activation of enzyme.
(4) Opening and closing of stomata.
(5) Maintenance of turgidity of cell.
[A] All except 1
[B] All except 1 and 2
[C] All except 3
Which element is involved in the formation of mitotic spindle?
Following functions are related to which element mainly?
(1) Activate enzyme of photosynthesis and respiration.
(2) Involved in synthesis of DNA and RNA.
(3) Help to maintain structure of ribosome.
Which of the following group contains sulphur in all members?
[A] Thiamine, ferredoxin, aspartic acid
[B] Biotin, coenzyme A, methionine
[C] Methionine, proline, leucine
[D] DNA and RNA
Which of the following is true about iron?
[A] It is a constituent of ferredoxin and Cytochrome
[B] It activates catalase enzyme
[C] It is essential for formation of chlorophyll
Which element is related to the splitting of water in light reaction of photosynthesis?
Match the column:
Column I— Column IIA. Zinc — 1) Needed for synthesis of Auxin
B. Copper – 2) Essential for water splitting reaction
C. Boron – 3)Pollen germination
D. Molybdenum — 4) Component of nitrate reductase
E. Chlorine – 5) Associated with enzyme involved in Redox reaction
[B] A-1, B-2, C-3, D-4, E-5
[D] A-5, B-4, C-3, D-2, E-1
Which element generally activates carboxylase enzyme?
Following functions are related to
(1) Uptake and utilization of calcium
(2) Carbohydrate translocation
(3) Cell elongation and maturation
(4) Membrane functioning