It is the outer covering of a cell. It separates the cell from its environment. It is a bilipid layer composed of proteins and carbohydrates. Such membranes are also called as the unit membrane. It is a porous membrane through which selected substances can enter or leave the cell. The cell membrane is also called plasma membrane. The thickness of a unit membrane is about 75 A°.
]Movement of carbon dioxide or oxygen across the cell membrane occurs by a process called diffusion. Diffusion is the process of movement of molecules from one region with higher concentration to a region of lower concentration.
Cell membrane __________________. | |||
Right Option : C | |||
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________________________ membrane that surrounds all the organelles of a cell. | |||
Right Option : B | |||
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Biological membrane includes __________________ | |||
Right Option : D | |||
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