Final answer:
The cytoskeleton is a dynamic network of protein fibers providing structural support to the cell, maintaining its shape, positioning organelles, and facilitating intracellular transport. The correct answer is B) Dynamic polymerization; maintains cell shape.
Step-by-step explanation:
The cytoskeleton is an intricate network of protein fibers that plays a critical role in maintaining the structural integrity of the cell. It is not static; rather, it is a dynamic structure that undergoes dynamic polymerization and depolymerization, allowing it to adapt to the changing needs of the cell. Among its many functions, the cytoskeleton maintains the cell shape, secures organelles in specific positions, and facilitates the movement of cytoplasm and vesicles within the cell.
The correct answer to the question is B) Dynamic polymerization; maintains cell shape. The cytoskeleton is composed of three main types of fibers: microfilaments, intermediate filaments, and microtubules. Microfilaments, made of actin, are important for cell motility and muscle contraction, whereas intermediate filaments provide tensile strength and support. Microtubules are responsible for cell division, intracellular transport, and the structural components of cilia and flagella.