NCERT Important Questions Class 9 Science biology Chapter 5
Important NCERT Extra Questions
Chapter 5 The Fundamental Unit of Life
NCERT Book Extra Questions for Session 2022-2023
CBSE Board and UP Board Others state Board
Plasma mebrane is permeable to water. How does a cell show endosmosis or exosmosis?
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Water passes through the plasma membrane both inwardly as well as outwardly. Net movement. Occurs along its concentration gradient, from the side of pure water or dilute solution (high water concentration) to cell side of concentrated solution (low water concentration). A cell placed in dilute solution (hypotonic solution) will show endosmosis because the external solution has higher concentration of water’ A cell placed in hypertonic solution (i.e., concentrated solution) will show exosmosis because cell sap has higher concentration of water.