Question:

A cell swells up when kept in

Updated On: Jul 5, 2022
  • hypotonic solution
  • hypertonic solution
  • isotonic solution
  • any of three
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The Correct Option is A

Solution and Explanation

In a hypotonic solution the concentration of outer solution (in which the cell is placed) is lower than concentration of cell sap. When a cell is placed in hypotonic solution then endosmosis i.e. entry of water from outside to the cell through plasma membrane occurs which makes the cell again turgid and it swells up. When a cell is placed in hypertonic solution then exosmosis occurs. The protoplasm shrinks and leaves the cell wall and the cell becomes flaccid which is called plasmolysed cell. Thus exosmosis leads to plasmolysis.
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Top Questions on Transport in Plants

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Concepts Used:

Transport in Plants

The two types of conducting tissues that are used to transport the water and minerals in plants such as:

Xylem:

Xylem is a long, non-living tube running from the roots to the leaves via the stem. The water is absorbed by the root hair and goes through cell-to-cell movement by osmosis until it reaches the xylem. This water is then transported throughout the xylem vessels to the leaves and is evaporated by the process of transpiration.

The xylem is also composed of lengthened cells like the phloem. However, the xylem is mainly accountable for transporting water to all plant parts from the roots. Since they serve such a vital function, a single tree would have a lot of xylem tissues.

Phloem:

The phloem is accountable for the translocation of nutrients and sugar like carbohydrates, produced by the leaves to areas of the plant that are metabolically in force. It is powered by living cells. The cell walls of these cells structurize small holes at the ends of the cells known as sieve plates.

Means of Transportation in Plants:

Transportation in plants is by 3 means, they are as follows:

  • Diffusion
  • Facilitated diffusion
  • Active Transport