Which cellular structure develops fibers used during cell division?

Which cellular structure develops fibers used during cell division?

• A. Vacuoles
• B. Rough ER
• C. Microfilaments
• D. Centrioles

Answer: (D)

During cell division, the spindle apparatus made of microtubule fibers is required to separate chromosomes. The centrosome, which in many cells contains a pair of centrioles, organizes and anchors these microtubules to form the spindle fibers. The centrioles duplicate and move to opposite poles, guiding the assembly of the spindle so chromosomes can be pulled apart accurately. Other structures mentioned don’t create spindle fibers: vacuoles store substances, rough ER handles protein synthesis, and microfilaments (actin) are involved in other cellular processes like cytokinesis, not spindle formation. Thus, centrioles are the structures responsible for developing the fibers used in cell division.

During cell division, the spindle apparatus made of microtubule fibers is required to separate chromosomes. The centrosome, which in many cells contains a pair of centrioles, organizes and anchors these microtubules to form the spindle fibers. The centrioles duplicate and move to opposite poles, guiding the assembly of the spindle so chromosomes can be pulled apart accurately. Other structures mentioned don’t create spindle fibers: vacuoles store substances, rough ER handles protein synthesis, and microfilaments (actin) are involved in other cellular processes like cytokinesis, not spindle formation. Thus, centrioles are the structures responsible for developing the fibers used in cell division.