In the lab experiment, the semipermeable membrance you will use is dialysis tubing, shown above with a solution inside. Which part of a cell is the dialysis tubing most similar to?

The correct answer is the cell membrane.

A cell membrane is formed of phospholipids, that is, a kind of fat or lipid, and proteins. Cell membranes are semipermeable that signifies that the molecules can travel via them. This is very essential for a cell to thrive.

A cell membrane is considered as a semi-permeable membrane as it permits some of the molecules to pass through them and ceasing others to go through them. It safeguards the intracellular organelles from the external surroundings. It selectively permits the conduction of molecules in and out of the cell.

Cell membrane of cell is most similar to dialysis tubing.

Explanation: The term semipermeable means permeable to some molecules, means some specific molecules are allowed to cross the barrier while some are not. In the dialysis tubing only some big size molecules and water are allowed to cross the membrane while blood cells are not allowed to enter and in cell membrane only non polar and some specific molecules allowed to enter while polar molecules are not allowed. That is why cell membrane is similar to dialysis tuning.