Question

1. a learner observes a cell under a microscope at × 800 magnification. if the actual size of the cell is 0.05mm, what is the size of the image?
2. name five structures that are visible under a light microscope in both plant and animal cells.
3. what is the function of the mitochondria in a cell?
4. give two differences between plant and animal cells as seen under a light microscope.

Explanation:

1. To find the size of the image under a microscope, use the formula Image size = Actual size × Magnification. Given actual size = 0.05mm and magnification = 800, Image size = 0.05×800 = 40mm.
2. Structures visible under a light - microscope in both plant and animal cells include the cell membrane, nucleus, cytoplasm, mitochondria, and endoplasmic reticulum.
3. The function of mitochondria in a cell is to produce energy in the form of ATP through cellular respiration.
4. Two differences between plant and animal cells: Plant cells have a cell wall, while animal cells do not; plant cells have chloroplasts for photosynthesis, which animal cells lack.

Answer:

1. 40mm
2. Cell membrane, nucleus, cytoplasm, mitochondria, endoplasmic reticulum
3. Produce energy (ATP) through cellular respiration
4. Plant cells have a cell wall; plant cells have chloroplasts