Cell structures：练习题

Which of the following statements correctly describes a feature of ribosomes in eukaryotic cells?

A student uses a light microscope to view an animal cell. The image of the cell measures \(40\text{ mm}\) in length. If the actual size of the cell is \(0.08\text{ mm}\), what is the magnification used?
Use the formula: \(\text{Magnification} = \frac{\text{Image size}}{\text{Actual size}}\).

Electron microscopy has significantly increased our understanding of sub-cellular structures.
Which statement correctly explains why electron microscopes have a higher resolution than light microscopes?

Which sub-cellular structure is the main site of aerobic respiration within a eukaryotic cell?
Note: These structures contain enzymes necessary for the process.

Which sub-cellular structure, commonly found in plant cells but absent in animal cells, provides a rigid barrier and structural support for the cell?

Which sub-cellular structure is the site of protein synthesis in both prokaryotic and eukaryotic cells?

A student observes a plant cell with an actual width of \(0.05\text{ mm}\). Using a light microscope with a magnification of \(\times 400\), calculate the image width of the cell in \(\text{mm}\).

All living organisms are composed of cells, which contain various sub-cellular structures.
prokaryotic cell (such as a bacterium) and a eukaryotic cell (such as a plant cell). Identify two structures found in both and two structures found only in the eukaryotic cell.
ribosomes and mitochondria in the functioning of a cell.
total magnification.
electron microscope instead of a light microscope to study these cells.