Question

What is the barrier between the inside and outside of a cell made of?
1. Protein bilayer
2. Carbohydrate bilayer
3. Nucleic acid bilayer
4. Lipid bilayer

Answer 1

$Answer$

The membrane separates the extracellular space, outside of the cell, from the cytosol inside the cell. The plasma membrane is the border between the interior and exterior of a cell. As such, it controls passage of various molecules—including sugars, amino acids, ions, and water—into and out of the cell.

Answer 2

Explanation:

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