Question

How do you observe cell membrane in a peel of rheo leaf under microscope? draw the diagram of it? write your observations​

Answer 1

Answer:

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Answer 2

Answer:

Procedure

Take two glass slides and place them on the table.Take a rhoeo leaf from the Petri dish.Fold the leaf and tear it along the lower side of the leaf.Using a forceps, pull out two small segments of thin transparent layer from the lower epidermis of the rhoeo leaf.Place the epidermal peels on both glass slides.Using a dropper, take some sodium chloride 0.1% solution from the beaker.Put 1 to 2 drops of solution on one slide.Using another dropper, take sodium chloride 5% solution from the beaker.Put 1 to 2 drops of solution on the next slide.Place a cover slip over the peel of both slides using a needle.Place the slides one by one under the compound microscope.Observe them under the microscope.

Simulator Procedure (as performed through the Online Labs)

You can select the concentration of NaCl solution using the drop down list, ‘Select the concentration of NaCl solution: ’Drag and drop the slide onto the stage of the compound microscope.Click on the eye piece of the compound microscope to view the cells.We can observe a controlled normal cell and a user selected cell.Click on the start button to start the experiment.A timer is shown and you need to wait till the timer stops.Based on your observation, you can indicate the type of solution used for selected sample by clicking on the corresponding check box.Click on the information icon to see the inference.You can redo the experiment anytime by clicking on the ‘Reset’ button.

Observation

After half an hour we can observe that cells in sodium chloride 0.1% solution appear turgid, while cells in the sodium chloride 5 % solution show plasmolysis.

Conclusion

When plant cells are immersed in sodium chloride 5 % solution or concentrated salt solution, water moves through the cell membrane into the surrounding medium because the water concentration inside the cell is greater than that which is outside the cell. Ultimately the protoplasm causes shrinkage and assumes spherical shape. This is called plasmolysis. When a plant cell is immersed in sodium chloride 0.1% solution or dilute salt solution, the water moves into the cell because of the higher concentration of water outside the cell than inside the cell.  The cell then swells and becomes turgid.

Explanation:

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