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

40. The cellular structure that directly provides the mechanical pulling force to segregate sister chromatids during both animal and plant nuclear division is the

A. Actin microfilament belt
B. Mitotic spindle apparatus made of microtubules
✓
C. Cellulose microfibril matrix
D. Phragmoplast vesicle fusion line

📝 Explanation

The spindle apparatus, built from tubulin heterodimers, attaches to kinetochores to pull chromosomes to opposite poles in all eukaryotic cells.

📖 Additional Information

  • Actin microfilament belt
  • Mitotic spindle apparatus made of microtubules
  • Cellulose microfibril matrix
  • Phragmoplast vesicle fusion line

The spindle apparatus, built from tubulin heterodimers, attaches to kinetochores to pull chromosomes to opposite poles in all eukaryotic cells.

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