What Is The Structure Of Cell Membrane?


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saima jabeen Profile
saima jabeen answered
Cell membrane is the outermost layer of the animal cell. In plants cell membrane is under the cell wall. Structure of the cell membrane can be defined by the fluid mosaic model.
According to this model cell membrane is a double layer of protein and phospholipids.
Phospholipids molecule is present in the form of two layer and protein molecules are embedded in the lipid bi layer. So the appearance is like a sea of lipids and protein molecules are floating into the lipid sea.
Phospholipids have one polar end and other non polar end. Non polar ends face each other in the middle of the lipid layer.
Cell membrane is selectively permeable membrane that it only allows the selective particles to enter in it.
Cholesterol is present in the cell membrane or in animal cell membrane. Protein that embedded is called as intrinsic protein. This protein helps to move ions into the membrane. When carbohydrates unit with protein it form the glycoprotein. When carbohydrate unit with lipids it is called glycolipids. Both make a glycocalyx. The glycocalyx is necessary for cell to cell recognition.
Ryan Rugraff Profile
Ryan Rugraff answered
A cell membrane is a semi-permiable structure that keeps the nuclei and cell machinery in place and intact, while allowing nutrients and chemical messages through and keeping waste products, or possible invaders such as a virus out. The structure of the cell membrane cannot be given due to the fact that each type of cell has a different structure for it's membrane.
Anonymous Profile
Anonymous answered
Cell membrane is an important component of the cell. It regulates the type of material that can enter and leave the cell. It is made up of three types of components: lipids, protein and carbohydrates.
Unsaturated fatty acids which belong to the fat family play an important role in the fluidity of the cell membrane with respect to temperature change. The membrane remain fluid to a certain extent after which it solidifies this temperature is determined by the fatty acid composition of the membrane
Phospholipids after forms of lips consisting of two fatty acids are another major component of the cell membrane. There are described as molecules having both hydrophobic and hydrophilic regions. A cell membrane is mainly held together by hydrophobic interactions. The phospholipids in the cell form a phospholipids bilayer which basically acts as a semi permeable boundary between the cell membrane and its external environment.
Protein molecules which form 50% of the dry weight of most cells, give the cell membrane its mosaic quality. They also determine most of the membrane's specific functions.
Carbohydrates in cell membrane are covalently bonded to lipids and proteins to form glycolipid and glycoprotein respectively. Their location on the cell's surface acts as marker to distinguish between different types of cell.

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