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Transport in Plants

Short Answer Type

81. What is the relation between water potential , solute potential and Pressure potential

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Long Answer Type

82. Does transpiration bring any useful function in plant ?

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Short Answer Type

83. Give the water potential for the following :
a. Pure water
b. Fully turgid cells
c. Concentrated solution

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84. Write short notes on :

Plasmolysis

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85. In which direction water flows regarding water potential.

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86. Describe the role of osmotic potential in regulating water potential of plant cells.

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87. Describe osmosis as a special case of diffusion.

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88. What type of molecules undergo facilitated diffusion ?

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89. Comment upon the rate of diffusion. Name the factors that affect the rate of diffusion.

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Long Answer Type

90. Give the comparison among simple diffusion, facilitated diffusion and active transportation.

Simple Diffusion

Facilitated Diffusion

Active Transport

1. Membrane proteins are not required .

2. It is not selective.

3. Saturation does not occur.

4. It does not occur against concentration gradient.

5. ATP is not required.

1. Membrane proteins are required.

2. It is selective.

3. Saturation occurs.

4. Not against the concentration gradient.

5. ATP is not required.

1 . Membrane proteins are required.

2. It is selective.

3. Saturation occurs

4. Against the concentration gradient.

5. It needs ATP.

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