Examination of Onion Peel

All organisms are made up of cells.

Studying these cells helps us understand how organisms function.

Cellular components work together to carry out life functions.

And the cellular processes enable organisms to meet their basic needs.

To study these cells, we can carry out experiments.

One such experiment is studying the peel of onion under the microscope.

In this experiment, we will study the structure of a plant cell.

For this experiment, we need an onion skin, iodine, slide, coverslip, and a microscope.

The experiment starts with breaking an onion slice into two.

Take an onion and peel it.

Then Remove a small piece of the inner surface of the onion skin very carefully and try to take the thinnest skin.

Place the piece of onion skin in the middle of a slide.

Cover the piece of skin with a drop of iodine make sure to put a single drop and don’t make the onion piece float.

This iodine stain will stain different parts of the cell so that different organelles can be seen.

Now, place a coverslip over the onion skin very slowly so that there are no air bubbles in it

Place the slide on the stage of the microscope set it to low power and adjust the focus on the onion skin

Observe this slide under low power first then change to high power and try to identify the cell membrane, nucleus, and cytoplasm.

The cells may appear as a wall of rectangular bricks

Large, rectangular interlocking cells having visible distinct cell walls surrounding the cells, can be seen.

Darkly stained nucleus, Large vacuoles at the center, also small granules may be observed inside the cells (within the cytoplasm).

Revision

Cellular components work together to carry out life functions. And the cellular processes enable organisms to meet their basic needs.

In this experiment, we will study the structure of a plant cell

For this experiment, we need an onion skin, iodine, slide, coverslip, and a microscope

Prepare the slide by carrying out the following steps

Darkly stained nucleus, Large vacuoles at the center, also small granules may be observed inside the cells (within the cytoplasm)

The End