What is the role of special proteins in diffusion? from Biology T

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91. What is the role of special proteins in diffusion?


The special protein elps in the facilitated diffusion of substances across membranes without the expenditure of energy. These proteins form channels in the membrane for molecules to pass through. For example - the porins are special proteins that allow molecules of the sixe of the protein to pass through. 
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92. Difference between the following
(c) Osmotic Pressure and Osmotic Potential
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93. Explain pressure flow hypothesis of translocation of sugars in plants.
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94. Describe the role played by protein pumps during active transport in plants.
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95.

Explain why xylem transport is unidirectional and phloem transport  bi-directional.

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96. Difference between Diffusion and Osmosis
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97. What essential role does the root endodermis play during mineral absorption in plants?
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 Multiple Choice QuestionsLong Answer Type

98. How does water is absorbed by the roots ? Discuss different pathways for its translocation.
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 Multiple Choice QuestionsShort Answer Type

99. Difference between Imbibition and Osmosis
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 Multiple Choice QuestionsLong Answer Type

100. Explain transpiration and photosynthesis are complementary to each other.
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