Question

what is cell membrane

Answer 1

cell membrane is the semipermeable membrane present in a cell surrounding the cytoplasm which protects the cytoplasm and cell contents from external environment.

Answer 2

Hey friend,
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Plasma membrane : The outermost elastic membranes covering of the cell                                          that separates its contents from the external                                                        environment is known as Plasma membrane. It is a living flexible membrane. it is 6-8 nm thick. It allows entry of certain substances as well as exit of some substances.
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@Ankit1234
#Moderator Brainly