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Answer to Question #57827 in Cell Biology for tracy guido

Question #57827
Select the phrases that describe the plasma membrane
creates a barrier between the inside and outside of the cell
separates the nucleus and the cytosol
provides a rigid structure that allows the cell to hold its shape
regulates transport of molecules into and out of the cell
Expert's answer
Correct answers:
1. creates a barrier between the inside and outside of the cell
2. regulates transport of molecules into and out of the cell
Plasma membrane is semipermeable and thus, creates the barrier between the inside and outside of the cell. It contains protein carriers and channel proteins, which regulate transport of molecules across the membrane.
However, the membrane is not rigid, it is rather flexible. Plasma membrane is cell membrane, not nuclear membrane. Thus, the other variants are false.

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