Question

a student models facilitated diffusion by showing a molecule passing through a channel protein. another student argues the model is inaccurate because it fails to show energy being used. which statement most effectively evaluates the second students argument based on the text? the argument is strong; all transport proteins are a feature of active transport, which always requires energy. the argument is flawed; passive transport is defined by the use of vesicles, not the absence of energy. the argument is strong; the molecule is too large to pass through the membrane without the cell expending energy. the argument is flawed; facilitated diffusion is a type of passive transport, meaning it does not require energy input from the cell.

Explanation:

Facilitated diffusion is passive transport. It uses transport proteins like channel - proteins but does not require energy input from the cell. The second student wrongly assumes energy is needed for this process.

Answer:

The argument is flawed; facilitated diffusion is a type of passive transport, meaning it does not require energy input from the cell.