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The plasma membrane's function is that it allows substances to enter or leave the cell. Its importance is that it acts as a boundary, holding the cell constituents together and keeping other substances from entering. It is found underlying the cell membrane in the cytoplasm and provides a scaffolding for membrane proteins to anchor to.
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The plasma or cell membrane is made up of a double layer of phospolipid molicules with holes through it made from proteins.
For an fuller explanation as to how it is structured etc. look in the related link below
phospholipids
Wiki User
∙ 8y ago
Wiki User
∙ 12y agothere are four main parts of the plasma membrane of a cell.
1) the lipid bilayer: this is made up of amphipathic molecules, with the polar heads on the outsides and the non polar tails in the middle. this part is semi-permeable.
2) the proteins: these work as canals to pump larger molecules through the bilayer which couldn't otherwise fit.
3) the carbohydrates: these are different on each cell and are used as the "chemical id tag" for identifying other cells.
4) the cholesterol: this is used to keep the lipid bilayer as plasma instead of turning into a solid.
hope this helps (:
Wiki User
∙ 12y agoPhospholipids, glycolipids, proteins, glycoproteins and steroids.
Wiki User
∙ 12y agoI believe it is carbohydrates and Steroids
Wiki User
∙ 13y agocarbon dioxide and amimo acid
Wiki User
∙ 13y agophospholipid
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∙ 14y agoPhospholipids
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∙ 13y agoProteins and Lipids
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Where is cholesterol found in cell membrane?
The plasma membrane is present in all prokaryotic and eukaryotic cells. It is the semi-permeable membrane that encloses the cell. So to clearly answer your question, the plasma membrane is found on the outside of the cell; it encircles the cell.
Selective permeability refers to the fact that the plasma membrane keeps all molecules out of the cell?
Selective permeability refers to the fact that the plasma membrane can choose which molecules to let in or out of the cell.
What are the molecules in the plasma membrane made of?
phospholipids are the molecules that make up the plasma membrane and they are made of polar (hydrophilic) heads and 2 non-polar (hydrophobic) tails
What type of molecules embebbed in the plasma membrane allows molecules to pass through the membrane by active or passive transport?
proteins
Give the Chemical nature of plasma membrane and cell wall?
plasma membrane is made of organic molecules called lipds and proteins
Which structure regulates passage of molecules into and out of cells?
The cell membrane is a membrane separating the inside of the cell from the outside environment. This structure is also known as the plasma membrane or the cytoplasmic membrane.
What are most of the molecules that compose the plasma membrane?
phospholipids
What Molecules in the plasma membrane function as transporters?
Proteins
Where is cholesterol found in cell membrane?
The plasma membrane is present in all prokaryotic and eukaryotic cells. It is the semi-permeable membrane that encloses the cell. So to clearly answer your question, the plasma membrane is found on the outside of the cell; it encircles the cell.
Are plasma membrane found in plant cells?
Of course they are found in plant cells.Every living cell has a plasma membrane.
Selective permeability refers to the fact that the plasma membrane keeps all molecules out of the cell?
Selective permeability refers to the fact that the plasma membrane can choose which molecules to let in or out of the cell.
What are the molecules in the plasma membrane made of?
phospholipids are the molecules that make up the plasma membrane and they are made of polar (hydrophilic) heads and 2 non-polar (hydrophobic) tails
The plasma membrane is a semipermeable membrane. This means that it is?
it is permeable to some molecules and not permeable to others.
What type of molecules embebbed in the plasma membrane allows molecules to pass through the membrane by active or passive transport?
proteins
Give the Chemical nature of plasma membrane and cell wall?
plasma membrane is made of organic molecules called lipds and proteins
How do glucose molecules cross a plasma membrane?
Facilitated Diffusion
What is the job of the plasma membrane?
it regulates the entry and exitof the molecules
