Cell Biology Quiz

According to cell theory, which of the following statements is true?

• All living things are composed of cells, and cells can only originate from non-living matter.

• All living things are not composed of cells, but cells can originate from non-living matter.

• All living things are composed of cells, and cells can only originate from other cells.

• Only some living things are composed of cells, and cells can originate from non-living matter.

What is the function of the plasma membrane in a cell?

• It is responsible for the generation of energy within the cell.

• It acts as a phospholipid bilayer with embedded proteins that can form channels or pumps for the transport of molecules.

• It serves as the cell's storage area for genetic information.

• It is the site where protein synthesis occurs.

Which microscope provides greater magnification and resolution compared to light microscopes?

• Scanning electron microscope

• Transmission electron microscope

• Both scanning and transmission electron microscopes

• X-ray microscope

For studying the detailed structure of an organelle in a liver cell, which microscope should be used?

• Scanning electron microscope

• Transmission electron microscope

• Light microscope

• Confocal microscope

In the context of surface-to-volume ratios, what can be concluded about a small cell compared to a large cell?

• The small cell has a smaller surface area relative to volume.

• The small cell has a greater surface area relative to volume.

• Both small and large cells have similar surface-to-volume ratios.

• Surface-to-volume ratio is irrelevant in cell size.

What is the function of proteins in the plasma membrane that form channels (tunnels)?

• Actively transporting molecules

• Providing structural support

• Facilitating cell communication

• Shielding ions and hydrophilic molecules during transport.