Knock out the transport myths

Exercise and reference answers

Questions

1. Question

   Three of these claims about membrane transport are false.

   Choices

   1. Item

      Diffusion expends no energy

      Correct

      Yes

   2. Explanation

      Oxygen and CO2 pass by simple diffusion, uncharged

      Item

      Oxygen needs a channel protein

   3. Explanation

      It uses transport proteins but no cellular energy

      Item

      Facilitated transport burns ATP

   4. Explanation

      Osmosis moves water across it constantly

      Item

      Water can never cross a membrane

Instructions

Tap each claim you can prove false. The true one stays put.

Explanation