State two reasons why some molecules can pass through a certain membrane, but other molecules can not.

Question

Biology

Paige Richardson

29 September, 23:46

State two reasons why some molecules can pass through a certain membrane, but other molecules can not.

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Answers (2)

Know the Answer?

Clicker · Answer 1

The cell membrane has selective permeability and chooses which to pass through. Non polar molecules can pass easily with diffusion, but ions cannot.

Niko · Answer 2

Size and polarity

Explanation:

I can think of two reasons:

Size - the molecules may be too big to pass through the pores of the membrane Polarity - polar molecules and ions cannot pass through a nonpolar membrane.