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BIO NMDCAT CELL STRUCTURE & FUNCTION
nmdcat.online July 3, 2026

29. The cytoskeletal element composed of actin subunits that forms the contractile ring responsible for dividing the cytoplasm during animal cell cytokinesis is the

A. Microtubule
B. Intermediate filament
C. Microfilament
✓
D. Spindle fiber

📝 Explanation

Microfilaments made of actin interact with myosin motor proteins to generate the mechanical constricting force required for the cleavage furrow.

📖 Additional Information

  • Microtubule
  • Intermediate filament
  • Microfilament
  • Spindle fiber

Microfilaments made of actin interact with myosin motor proteins to generate the mechanical constricting force required for the cleavage furrow.

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