a cell membrane is the semipermeable membrane surrounding the cytoplasm of a cell.
The complete question is.
Which of the following best describes cell membrane
A. An impermeable lipid layer
B. A double layer of polymers
C. A flexible lipid double layer
D. A rigid single layer
The plasma membrane, or the cell membrane, provides protection for a cell. It also provides a fixed environment inside the cell, and that membrane has several different functions. One is to transport nutrients into the cell and also to transport toxic substances out of the cell. Thus, option "C" is correct.
A prokaryotic cell is found in those organisms that lack membrane-bound organelles.
For example, the organelle, and nucleus found in these organisms are not surrounded by any nuclear membrane as seen in eukaryotes.
Examples of organisms that are prokaryotic are found in the kingdom Monera which includes the blue-green algae.
A typical prokaryotic cell contains the following:
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