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

57. The cell structure that acts as a selective filter, screening the entry of macromolecules into the cytoplasm of a plant cell despite the porous nature of the wall, is the

A. Middle lamella
B. Plasma membrane
✓
C. Secondary wall
D. Tonoplast

📝 Explanation

The plasma membrane contains transport proteins and acts as the true selective barrier regulating what enters or leaves the cytoplasm.

📖 Additional Information

  • Middle lamella
  • Plasma membrane
  • Secondary wall
  • Tonoplast

The plasma membrane contains transport proteins and acts as the true selective barrier regulating what enters or leaves the cytoplasm.

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