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Question 110

A learner says simple diffusion stops whenever a cell cannot supply ATP. Which correction is accurate?

  1. Diffusion always uses ATP to move particles downhill.
  2. Diffusion requires a cell to contract around particles.
  3. Diffusion occurs without direct cellular energy input.Bonne réponse
  4. Diffusion happens only through energy-powered pumps.

Explication

Simple diffusion is passive, so random molecular motion and a concentration difference can drive it without direct cellular energy input. ATP-powered pumping is a different process and should not be used to define simple diffusion.

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Question 110: A learner says simple diffusion stops whenever a cell… · Cells and Microscopy · Questena