Where do lipids and proteins constituting the cell membrane get synthesised

The lipids and proteins that constitute the cell membrane get synthesized in the Endoplasmic reticulum (ER) of the cell. The ER is is divided into two types:1) Rough ER & ii) smooth ER. Attached to the surface of the Rough ER are non-membranous particles called the ribosomes where the proteins are synthesized. The lipids are synthesized inside the Smooth ER.

Lipids and proteinsconstituting the cell membrane are synthesized in the endoplasmic reticulum. SER (Smooth endoplasmic reticulum) helps in the manufacturing of lipids. RER (Rough endoplasmic reticulum) has particles attached to its surface, called ribosomes. These ribosomes are the site for protein synthesis.

Cell Robert Hooke Discovered and coined the term cell in 1665 Robert Brown Discovered Cell Nucleus in 1831 Schleiden and Schwann Presented The cell theory, that all the plants and animals are composed of cells and that the cell is the basic unit of life. Schleiden (1838) and Schwann (1839). • With the discovery of the electron microscope in 1940, it was possible to observe and understand the complex structure of the cell and its various organelles. Cell Organelles Plasma Membrane or Cell Membrane • Cell membrane is also called the plasma membrane. • It can be observed only through an electron microscope. • Plasma membrane is the outermost covering of the cell that separates the contents of the cell from its external environment. Endocytosis • The plasma membrane is flexible and is made up of organic molecules called lipids and proteins. • The flexibility of the cell membrane also enables the cell to engulf in food and other material from its external environment. Such processes are known as endocytosis (endo → internal; cyto → of a cell). Amoeba acquires its food through such processes. Diffusion • Plasma membrane is a selectively permeable membrane [The plasma membrane is porous and allows the movement of substances or materials both inward and outward]. • Some substances like carbon dioxide or oxygen can move across the cell membrane by a process called diffusion [spontaneous movement of a substance from a region of high concentration (hypertonic solution) to a region wh...

Ribosomes are the factories of protein synthesis. which remain associated with rough ER. Rough endoplasmic reticulum, is called so due to the appearance of this organelle in electron micrographs. The roughness results from ribosomes, which are studded on the membranes of the organelle. Rough ER, is a network of interconnected flattened sacs, with two main functions. One is to make more membranes so as to accommodate the proteins made by ER enzymes. As a result, the ER membrane enlarges. The other major function of rough ER is to make proteins that are secreted by the cell. An example of such a secretory protein is an antibody, a defensive molecule made and secreted by white blood cells. Ribosomes of the rough ER synthesize the antibody's polypeptides, which assemble into functional proteins inside the ER. The synthesis and packaging of a secretory protein is done by ER and can be understood as following : 1. As the polypeptide is synthesized, it passes into the ER. 2. Short chains of sugar molecule are then linked to the polypeptide, making the molecule a glycoprotein. 3. The ER packages these glycoproteins into tiny sacs called a transport vesicles which buds off from the ER membrane and travels to the Golgi apparatus for further processing. From there, a transport vesicle carry these molecules to the plasma membrane and release its contents from the cell. n Smooth endoplasmic reticulum (SER)

Membrane biogenesis. Sol: Membrane biogenesis is the process which involves the synthesis of cell membrane with the help of proteinsand lipids. Endoplasmic reticulum is responsible for the synthesis of thesemembranes. Lipids and proteinsconstituting the cell membrane are synthesized in the endoplasmic reticulum. SER (Smooth endoplasmic reticulum) helps in the manufacturing of lipids. RER (Rough endoplasmic reticulum) has particles attached to its surface, called ribosomes.

Cell membrane synthesis: • The cell membrane is made up of bilayer of phospholipid (a kind of lipid) and proteins embedded in it. • The synthesis of proteins and lipids takes place in the endoplasmic reticulum. • It is of two types- smooth endoplasmic reticulum (SER) and rough endoplasmic reticulum (RER). • The lipid synthesis occurs in the smooth endoplasmic reticulum (SER). • Rough endoplasmic reticulum (RER) has ribosomes attached to its membrane. • Ribosomes are the factory of all protein being synthesised in the cell. • Therefore, membrane proteins are also synthesised by rough endoplasmic reticulum (RER). Final answer: The lipids and proteins constituting the cell membrane gets synthesised in smooth endoplasmic reticulum (SER) and rough endoplasmic reticulum (RER) , respectively.

Ribosomes are the factories of protein synthesis. which remain associated with rough ER. Rough endoplasmic reticulum, is called so due to the appearance of this organelle in electron micrographs. The roughness results from ribosomes, which are studded on the membranes of the organelle. Rough ER, is a network of interconnected flattened sacs, with two main functions. One is to make more membranes so as to accommodate the proteins made by ER enzymes. As a result, the ER membrane enlarges. The other major function of rough ER is to make proteins that are secreted by the cell. An example of such a secretory protein is an antibody, a defensive molecule made and secreted by white blood cells. Ribosomes of the rough ER synthesize the antibody's polypeptides, which assemble into functional proteins inside the ER. The synthesis and packaging of a secretory protein is done by ER and can be understood as following : 1. As the polypeptide is synthesized, it passes into the ER. 2. Short chains of sugar molecule are then linked to the polypeptide, making the molecule a glycoprotein. 3. The ER packages these glycoproteins into tiny sacs called a transport vesicles which buds off from the ER membrane and travels to the Golgi apparatus for further processing. From there, a transport vesicle carry these molecules to the plasma membrane and release its contents from the cell. n Smooth endoplasmic reticulum (SER)

Lipids and proteinsconstituting the cell membrane are synthesized in the endoplasmic reticulum. SER (Smooth endoplasmic reticulum) helps in the manufacturing of lipids. RER (Rough endoplasmic reticulum) has particles attached to its surface, called ribosomes. These ribosomes are the site for protein synthesis.

Cell membrane synthesis: • The cell membrane is made up of bilayer of phospholipid (a kind of lipid) and proteins embedded in it. • The synthesis of proteins and lipids takes place in the endoplasmic reticulum. • It is of two types- smooth endoplasmic reticulum (SER) and rough endoplasmic reticulum (RER). • The lipid synthesis occurs in the smooth endoplasmic reticulum (SER). • Rough endoplasmic reticulum (RER) has ribosomes attached to its membrane. • Ribosomes are the factory of all protein being synthesised in the cell. • Therefore, membrane proteins are also synthesised by rough endoplasmic reticulum (RER). Final answer: The lipids and proteins constituting the cell membrane gets synthesised in smooth endoplasmic reticulum (SER) and rough endoplasmic reticulum (RER) , respectively.

Membrane biogenesis. Sol: Membrane biogenesis is the process which involves the synthesis of cell membrane with the help of proteinsand lipids. Endoplasmic reticulum is responsible for the synthesis of thesemembranes. Lipids and proteinsconstituting the cell membrane are synthesized in the endoplasmic reticulum. SER (Smooth endoplasmic reticulum) helps in the manufacturing of lipids. RER (Rough endoplasmic reticulum) has particles attached to its surface, called ribosomes.