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

31. The process of endocytosis (phagocytosis and pinocytosis) is a major mechanism for internalizing bulk materials that occurs

A. Exclusively across the plant cell wall
B. Across the flexible plasma membrane of animal cells
✓
C. Inside the lumen of the central vacuole
D. Within the matrix of the chloroplast stroma

📝 Explanation

The rigid plant cell wall serves as a physical barrier that prevents the invagination of the plasma membrane required for endocytosis.

📖 Additional Information

  • Exclusively across the plant cell wall
  • Across the flexible plasma membrane of animal cells
  • Inside the lumen of the central vacuole
  • Within the matrix of the chloroplast stroma

The rigid plant cell wall serves as a physical barrier that prevents the invagination of the plasma membrane required for endocytosis.

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