Although onions are plants, students will not see any chloroplasts in their slides. The organelles that were visible in this type of cell were the nucleus, the cytoplasm and the cell membrane. Students have the opportunity to experiment and observe the onion membrane with different stains methylene blue and iodine and without the stain and observe the differences.
Put a drop of glycerine over the stained scrapings and cover it gently with a coverslip. Animal cells are usually irregular in shape. At X total magnification, we were only able to view one cell at a time, due to the fact that the cells were separated from each other. Clean and dry glass slide and coverslip should be used.
All living organisms are made up of cells. Remove the slide and dispose of the piece of onion, and wash the slide and cover slip For the Cheek Cell Take a clean toothpick and gently scrape the inside of your cheek Prepare a wet mount like in steps Over-staining and under-staining of the cells should be avoided.
Separate a thin, transparent peel from the convex surface of the scale leaf with the help of forceps. A large number of rectangular cells are visible. Adjust focus for clarity to observe. Add a drop of water arid a drop of methylene blue.
This is because they have a cell wall made up of cellulose which maintains its shape. With the help of a brush and needle transfer the peel on the slide. They are surrounded by a cell membrane and contain cytoplasm and nucleus. The onion skin cell, an example of a plant cell, generally has a rigid, rectangular shape.
Add two drops of safranin stain in the watch glass to stain the peel.
An onion, glass slide, watch glass, coverslip, forceps, needles, brush, blade, filter paper, safranin, glycerine, dropper, water, and a compound microscope.
Observe the prepared mount of the peel under the low and high magnification of a compound microscope. In a plant cell, a cell wall surrounds the cell membrane. The animal cell structure is the most prominent in human cheek cells.
Although onions may not have as much starch as potato and other plants, the stain iodine allows for the little starch molecules to be visible under the microscope. Discussion The cheek cell, an example of an animal cell, generally has a circular, oval shape.
A correct statement in my hypothesis was that most of the important organelles are visible through the microscope. Toothpick, slide, coverslip, filter paper, needles, brush, watch glass, methylene blue, dropper, glycerin, water and a compound microscope Theory: These cells have a dark stained nucleus and a large vacuole in the centre.
Also, like the cheek cell, the onion skin cells were pushed together so that no spaces were in between. Use the coarse adjustment knob to focus Rotate the nosepiece to medium power.
Place the scrapings in the centre of a clean glass slide. Moreover, to avoid breaking the slide and damage to the microscope objective lenses during observation, it is important that the optical tube be lowered to the point that the objective lens is as close to the slide as possible.
If someone knows about the cell and how it works they could find a way to counteract viruses and illnesses, thus creating medicine and a way to cure the virus or illness.
Observe the scrapings under the low and high magnifications of a microscope.Cheek and Onion Cell ExperimentThe aim of this experiment will be to show that different cells have different structures and ultimedescente.comesisI believe that viewing these different cell types under the microscope will show more detail and variations /5(1).
Having observed the onion cell under the microscope, students will be able to learn the differences between animal and plant cells in addition to the function of the different parts of the cell. Check out other microscope experiment viewing Cheek Cells or Sugar Crystals as well and have fun looking at Leaf Structure under the Microscope!
ADVERTISEMENTS: Experimental Preparation of Temporary Mounts of an Onion Peel!
Experiment: Objective: To prepare a stained temporary mount of an onion peel and to record observations and draw labeled diagrams. To prepare a stained temporary mount of human cheek cells and to record observations and draw labelled diagrams.
Apparatus and. Microscope Lab 2 Cheek Cells & Onion Cells! Material To observe onion cells under the microscope: Animal cells: Human cheek cell What is a cell? A cell is the basic unit of life; all living things are composed of cells.
To Prepare Stained Temporary Mount of Onion Peel Materials Required. Real Lab Procedure. Pour some distilled water into a watch glass. Peel off a leaf from half a piece of onion and using the forceps, pull out a piece of transparent onion peel (epidermis) from the leaf.
Human cheek cells experiment from Microscopes for Schools. Observing cells from a human cheek and bacteria under a compound microscope.Download