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Subscribe online at http://www.mtg.in (^4875) 8 50 26 88 31 67 CONTENTS Vol. XVII No. 2 February 2015 Corporate Office: Plot 99, ...

Plants need to move (transport) various types of substances over short (within the cell, across the membranes, and from cell to ...

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chemical stimuli are also transported, though in very small amounts, sometimes in a strictly polarized or unidirectional manner, ...

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to pass through the membrane, so their movement has to be facilitated. biological membranes contain transport membrane proteins ...

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Table : Comparison of different transport processes Property Simple diffusion Facilitated diffusion Active transport requires s ...

in the form of heat. It is called heat of wetting or heat of hydration. The heat of wetting can be experienced during the kneadi ...

of a solution is always less than zero. Hence, water always moves from the less negative potential (–100 kPa) to more negative p ...

The direction and rate of osmosis depends upon the sum of two forces – pressure gradient (gradient of yp) and concentration grad ...

by salting tennis lawns, the weeds can be killed due to permanent plasmolysis and consequent death of their cells. Plants are no ...

Interrelationship of OP, TP (wP) and DPD (SP) The difference in the concentration of solutions, on two sides of a semipermeable ...

The hygroscopic water is held by colloidal soil particles, due to cohesive forces, and is absorbed by plants in a very small qua ...

in the soil water. This process is called passive absorption, as the absorption can occur independently of any activity of roots ...

Symplastic movement may be aided by cytoplasmic streaming. for e.g., cytoplasmic streaming in cells of the Hydrilla leaf, and th ...

(ii) a membrane which allows some substances to pass through it more readily than others is known as selectively/ differentially ...

an osmometer is filled with 0.5 M solution of NaCl in water. In which of the following solutions it must be immersed in order t ...

Assertion : Selectively permeable membranes allow passage of solvent molecules, only upto a certain extent. Reason : all plant ...