What gives the rough endoplasmic reticulum its characteristic?
The rough ER is characterized by the presence of membrane-bound ribosomes that give it a distinctive appearance under the microscope. These ribosomes look like studs and distinguish the organelle from the smooth sections of the ER. Some proteins are also synthesized by strings of ribosomes, called polysomes.
What cell has a lot of rough ER?
Cells that specialize in protein secretion contain large amounts of rough endoplasmic reticulum. For instance, cells of the pancreas that produce the protein insulin, have abundant rough endoplasmic reticulum.
What does rough ER look like?
Rough ER looks like sheets or disks of bumpy membranes while smooth ER looks more like tubes. Rough ER is called rough because it has ribosomes attached to its surface. The double membranes of smooth and rough ER form sacs called cisternae. Cells in your body that release oils also have more SER than most cells.
How can we identify RER and SER?
The smooth endoplasmic reticulum (SER) is distinguished from the rough endoplasmic reticulum (RER), the other basic type of endoplasmic reticulum, by its lack of ribosomes, which are protein-synthesizing particles that can be found attached to the outer surface of the RER to give the membrane its “rough” appearance.
How is endoplasmic reticulum important for?
The endoplasmic reticulum (ER) serves important functions particularly in the synthesis, folding, modification, and transport of proteins. The sarcoplasmic reticulum is a specialized type of SER that regulates calcium ion concentration in the cytoplasm of striated muscle cells. Ribosome. Learn more about ribosomes.
Why is plasma membrane called a selectively permeable membrane How do substances like CO2 and water move in and out of the cell?
Answer: Since it allows only selected material to pass through it that is why it’s called selectively permeable membrane. Substance like water move in and out through by the process of osmosis while gases like CO2 moves in MD outby process called Diffusion
What would happen if the plasma membrane ruptures or breakdown?
If the plasma membrane ruptures or breakdown then the cell will not be able to exchange material from its surrounding by diffusion or osmosis because it acts as a mechanical barrier. Thereafter, the protoplasmic material will be disappeared and the cell will die.
What would happen if the nucleus was removed from a cell?
It is the brain of the cell and controls most of its functions. If the nucleus is removed from the cell then the cell will not be able to function properly, it will not be able to grow. Also, the cell will not know what to do and there would be no cell division. Gradually, the cell may die
What would happen to the life of the cell if there was no Golgi complex?
The golgi apparatus packages proteins into vesicles inside of the cell before sending them to their destinations. The secretory activities of the cell would also cease to occur. Also, if there is no golgi apparatus, the plasma membrane would be affected because it needs to be able to grow larger for cell division.
What will happen when Golgi apparatus is removed from the cell?
When Golgi apparatus is removed from the cell,the modification of lipid and protein molecules synthesized by the cell is stopped. These modifications lead to the formation of functional forms of enzymes, hormones and other intracellular and extracellular secretions.
What is a function of Golgi body?
A Golgi body, also known as a Golgi apparatus, is a cell organelle that helps process and package proteins and lipid molecules, especially proteins destined to be exported from the cell. Named after its discoverer, Camillo Golgi, the Golgi body appears as a series of stacked membranes.