Question

Based on what you learned in the simulating dialysis (simple diffusion) activity, which solutes would not pass through the 20 mwco membrane? (choose all that apply)

Answer 1

Since the membrane has 20 Molecular weight cut-off, that means the molecule with molecular weight higher than 20 will not able to pass. Water molecular weight is 18 so it can pass.
The molecule with molecular weight higher than 20 would be
Protein or amino acid
Urea: molecular weight 60
Na+: molecular weight 23