Which cellular component provides structural support and also serves as tracks for movement of materials within the cell?

Which cellular component provides structural support and also serves as tracks for movement of materials within the cell?

• A. Cytoskeleton
• B. Cell membrane
• C. Ribosome
• D. Nucleus

Answer: (A)

The cytoskeleton provides structural support and serves as tracks for movement of materials within the cell. Its network of microfilaments, intermediate filaments, and microtubules gives the cell shape and stability, helps position organelles, and anchors components in place. At the same time, motor proteins move along these filaments to carry cargo—kinesin and dynein travel along microtubules to shuttle vesicles and organelles, while myosin moves along actin filaments for shorter-range transport and changes in cell shape. This combination creates an internal highway system that enables efficient transport and organization inside the cell. The other options don’t offer this dual role: the cell membrane is a boundary, ribosomes make proteins, and the nucleus houses genetic material and controls gene expression rather than providing intracellular transport tracks.

The cytoskeleton provides structural support and serves as tracks for movement of materials within the cell. Its network of microfilaments, intermediate filaments, and microtubules gives the cell shape and stability, helps position organelles, and anchors components in place. At the same time, motor proteins move along these filaments to carry cargo—kinesin and dynein travel along microtubules to shuttle vesicles and organelles, while myosin moves along actin filaments for shorter-range transport and changes in cell shape. This combination creates an internal highway system that enables efficient transport and organization inside the cell. The other options don’t offer this dual role: the cell membrane is a boundary, ribosomes make proteins, and the nucleus houses genetic material and controls gene expression rather than providing intracellular transport tracks.