Question

Which of the following is/are TRUE about a cell’s plasma membrane? (CHOOSE ALL THAT APPLY.)

Question 3 options:

Plant cells have a cell wall instead of a plasma membrane.


Proteins are embedded in the plasma membrane and contribute to its function.


The exterior of a phospholipid bilayer is hydrophilic, and the interior is hydrophobic (see figure above).


The plasma membrane regulates the movement of molecules and ions into and out of the cell.

Answer 1

Answer:

The plasma membrane regulates the movement of molecules and ions into and out of the cell.

Explanation:

Cell membranes protect and organize cells. All cells have an outer plasma membrane that regulates not only what enters the cell, but also how much of any given substance comes in. Unlike prokaryotes, eukaryotic cells also possess internal membranes that encase their organelles and control the exchange of essential cell components. Both types of membranes have a specialized structure that facilitates their gatekeeping function.