What is one of the primary functions of the cytoskeleton in eukaryotic cells?

• A. Cell division
• B. Structural support
• C. Organic molecule synthesis
• D. DNA replication

Answer: (B)

The primary function of the cytoskeleton in eukaryotic cells is to provide structural support. The cytoskeleton is a network of protein filaments and tubules that extends throughout the cytoplasm. This network plays a crucial role in maintaining the shape of the cell, anchoring organelles in place, and facilitating cellular movements. Its components, such as microtubules, intermediate filaments, and actin filaments, contribute to cell rigidity and organization, allowing cells to withstand mechanical stress and maintain their integrity.

While the cytoskeleton also participates in diverse functions like aiding in cell division, its primary role is structural support. This aspect is vital for processes that require the cell to maintain a specific shape, such as during growth, tissue formation, and response to external forces. Other options, such as organic molecule synthesis and DNA replication, are processes that occur in the cell but are primarily carried out by different organelles and do not directly involve the cytoskeleton.