Question

What are the functions of a cell membrane?​

Answer 1

Answer:  The cell membrane, therefore, has two functions: first, to be a barrier keeping the constituents of the cell in and unwanted substances out and, second, to be a gate allowing transport into the cell of essential nutrients and movement from the cell of waste products.

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Answer 2

Answer:

(i)  to be a barrier keeping the constituents of the cell in and unwanted substances out

(ii) to be a gate allowing transport into the cell of essential nutrients and movement from the cell of waste products.