Leaving Cert biology Q8 revision

During the course of your studies you examined animal cells under the microscope.

what type of animal cell did you examine?

• Human skin cell

• Human cheek cell

• A bacterial cell

• A human white blood cell

What stain did you use to observe the animal cell?

• Methylene blue

• Iodine

How did you obtain the animal cell?

• Licked the slide

• Using a scalpel I removed a thin layer of cells

• Using a cotton wool bud I swabbed the inside of my mouth

What was added to the slide after the stain?

• A drop of water

• A piece of tissue

• A cover slip

Why is a cover slip added to a microscope slide?

• To protect the lens

• To preserve the sample

• To prevent the sample from drying out

The sample is always observed

• Under the highest magnification first

• Under the lowest magnification first

If a sample is observed under the x10 magnification lens, the total magnification will be

• 20

• 40

• 100

• 400

From which plant did you obtain a sample of cells to observe under the microscope?

• Geranium

• Begonia

• Onion

How did you apply the stain to the plant cells?

• Used a cotton bud

• Used a dropper

• Used a mounted needle

How is the cover slip applied to a sample?

• Supported by a pencil at 90 degrees and dropped rapidly over the cells

• Supported by the finger and thumb and pressed firmly down on the cells

• Supported by the finger and thumb then slowly lowered at a 45 degree angle