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PUCET (Punjab) Facilitated Diffusion — practice questions

Explore 1 free Facilitated Diffusion questions in PUCET (Punjab) Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Facilitated Diffusion questions and exercises with answers

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**Aquaporins** are:Read the answer and worked solution →

Worked practice questions

**Aquaporins** are:

  1. Water-tight membrane proteins
  2. Membrane channel proteins that facilitate rapid passive water transport across cell membranes
  3. Water-storing tissues in succulents
  4. Active ATP-driven water pumps
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Correct answer: B. Membrane channel proteins that facilitate rapid passive water transport across cell membranes

Aquaporins (AQPs) are integral membrane channels that allow facilitated diffusion of water (and sometimes small solutes) through bilayers ~10×–100× faster than simple diffusion. Important in roots (water uptake) and guard cells (stomatal movement).

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