Question

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The plasma membrane is composed of a phospholipid bilayer with embedded proteins. What is one of the functions of the embedded proteins?

A.
protecting the cell from physical harm
B.
allowing specific substances to flow into the cell
C.
defining the cell's structure and shape
D.
preventing the phospholipid tails from binding together

Answer 1

B - the proteins can act as channels. They let substances that are dissolvable in ionic substances through. They are needed as the phospholipid bilateral dose not allow this.