The pH gradient across the cell membrane provides a powerful form of _____ potential energy largely responsible for driving phosphorylation:
A.Chermical
B.Physical
C.Electrical
D.Biological
Category: Agriculture Plant Physiology Mcqs
One of the following is a water-soluble pigment:
A.Carotene
B.Chlorophyll
C.Anthocyanin
D.Xanthophyll
Atmospheric nitrogen in the soil is fixed by:
A.Cereals
B.Pulses
C.Sugarcane
D.Cotton
In both transpirtions and evaporation water is lost in the form of vapour yet they differ because:
A.Both transpiration and evaporation are similar but the rate of water loss differs
B.Frequency of water loss is different in both of them
C.Transpiration is a physical process and evaporation is physiological process
D.Transpiration is a physiological process and evaporation is physical process
The ultra-structure of cell can be best studied by:
A.Autoradiography
B.X-ray diffraction method
C.Phase contrast microscope
D.None of these
The action of ethylene is effectively inhibited by ______ ion.
A.Boron
B.Manganese
C.Zinc
D.Silver
Who proposed the concept of unit membrane for tripartite structure of lipoproteins?
A.Davson and Danielli
B.Robertson
C.Seifriz
D.Altmann
High energy compounds:
A.Are produced in respiration only
B.Are compounds, which link, exergonic to endergonic process
C.Refer to sugar, the oxidation of which releases large amounts of energy during respiration
D.Are produced when ATP looses two of its phosphate groups
Which is a micronutrient?
A.Ca
B.Zn
C.P
D.Mg
A trace element essential for plant grwoth and radio-isotope which is used in cancer therapy is known is:
A.Calcium
B.Cobalt
C.Sodium
D.Iron
