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BIO NMDCAT cell membrane
nmdcat.online July 8, 2026

The movement of molecules down a concentration gradient through a protein is:

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

📝 Explanation

It is passive (no ATP) but uses a protein facilitator.

📖 Additional Information

  • Simple diffusion
  • Facilitated diffusion
  • Active transport
  • Pinocytosis

It is passive (no ATP) but uses a protein facilitator.

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