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Transport in Plants

Short Answer Type

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

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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?

The endodermal cells have transport proteins which act as control points, to adjust the quantity and types of solutes that reach the xylem. The suberin layer of the endodermis allows unidirectional active transport of the ions and the symplastic movement of water.

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