Which of the following element is present in a chlorophyll molecule?
Iron
Copper
Manganese
Magnesium
Which of the following elements are essential for photolysis of water?
Ca and Cl
Mg and P
Mn and Cl
Zn and Cl
The plants absorb Zn as
Zn
Zn 2+
ZnO
ZnSo4
The process by which a living organism receives and utilizes the chemical substances for its normal growth and development.
Growth
Nutrition
Productivity
None of these
Which one of the following mineral element plays an important role in biological nitrogen fixation?
Zinc
copper
manganese
molybdenum
Nitrogen is considered an unique element because it
Obtained from both minerals and non-mineral sources
Obtained from certain particulars mineral
Both (a) and (b)
The transport of mineral ions in the root through cell wall is called
Symplastic pathway
Apoplastic pathway
Passive absorption
Active absorption
The element molybdenum participates in
Flowering
Nitrogen fixation
Chromosome coiling
Carbon assimilation
Premature leaf fall is due to the deficiency of
Phosphorous
Nitrogen
Calcium
Potassium
Which is the wrong statement about plasma membrane?
Plasma membrane maintains the proper pH and ionic balance of the cell
Plasmodesmata present in the wall helps the movements of materials
Plasma membrane is semi-permeable
It permits movements of material and stimuli from cell to cell