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BIO NMDCAT cell membrane
nmdcat.online July 8, 2026

Which transport mechanism would a cell use to move a large, polar molecule down its concentration gradient?

A. Simple diffusion
B. Facilitated diffusion
✓
C. Active transport
D. Endocytosis

📝 Explanation

Facilitated diffusion uses transmembrane proteins to move molecules that cannot pass through the lipid bilayer directly.

📖 Additional Information

  • Simple diffusion
  • Facilitated diffusion
  • Active transport
  • Endocytosis

Facilitated diffusion uses transmembrane proteins to move molecules that cannot pass through the lipid bilayer directly.

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