What Is A Cell Made Up Of ?What Is The Structural Organization Of A Cell?
Chapter Name : The Fundamental Unit Of Life |
Sub Topic Code : 103_09_05_02_02 |
Topic Name : What Is A Cell Made Up Of ?What Is The Structural Organization Of A Cell? |
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Sub Topic Name : Cell Wall |
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Introduction
Cell wall is rigid outer layer covering, in addition to cell membrane.
Pre-Requisites:
Cells have organelles to perform specific functions.
Activity:
Place some Rheo leaf in boiling water. This kills the cells. Put a solution of sugar or salt on the mounted leaf and observe. It shows the osmosis ability and signifies the function of cell wall
Real Life Question:
What is the need of cell wall, when selectively permeable membrane already exists?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Cell Wall | Rigid outer covering in addition to cell membrane. |
| Cellulose | Complex substance; provides structural strength to plants. |
| Plasmoysis | Shrinkage or contraction of the protoplasm away from the wall of a living plant or bacterial cell, caused by loss of water through osmosis. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Peel of Rheo Leaf under microscope and solution of sugar or salt Understanding that every living cell undergo osmosis. | Understanding that every living cell undergo osmosis. |
Places to visit :
Biology Laboratory
Practical examples around us
| Examples | Explainations |
|---|---|
| Cell wall is present in all plant cells. |
What you learn in Theory:
Where the cell wall is found and what function it performs.
What you learn in Practice:
How does cell wall perform their function under dilute conditions?