9. (a) Name the parts of the light microscope labelled A and B - Leaving Cert Biology - Question 9 - 2011
Question 9
9.
(a) Name the parts of the light microscope labelled A and B.
A. Eyepiece or Eye lens
B. Platform or Stage
(b) Answer the following questions in relation t... show full transcript
Worked Solution & Example Answer:9. (a) Name the parts of the light microscope labelled A and B - Leaving Cert Biology - Question 9 - 2011
Step 1
From what plant did you obtain the cells?
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Answer
For this experiment, I obtained the cells from a suitable named plant such as an onion (Allium cepa) or a leaf from a plant like Elodea.
Step 2
How did you obtain a thin piece of a sample of the cells and prepare it for examination?
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To obtain a thin piece of the sample, I first cut or peeled a small section of the plant with a scalpel. I then placed the piece onto a clean microscope slide. Next, I added a drop of water to the slide, ensuring the sample was submerged. After that, I carefully placed a cover slip over the sample to protect it and prevent air bubbles.
Step 3
What stain did you use on the cells?
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I used iodine solution as the stain for the cells.
Step 4
Describe how you applied the stain.
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To apply the stain, I used a dropper to place a small amount of iodine solution onto one edge of the cover slip. I then tilted the slide to allow the stain to flow beneath the cover slip, ensuring even distribution while minimizing disturbance to the cells.
Step 5
Which objective lens should you begin with when using the microscope?
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I should begin with the 4X (low power) objective lens when using the microscope, as it provides a wider field of view and makes it easier to locate the sample.
Step 6
Give one cell structure that you observed that indicated that the cells were plant cells.
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One cell structure that I observed was the cell wall, which is characteristic of plant cells. Additionally, I noted the presence of chloroplasts, which are specifically involved in photosynthesis.
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