Admin Table of Contents
What cell does not have endoplasmic reticulum?
prokaryotes
The membranes are slightly different from cell to cell and a cell’s function determines the size and structure of the ER. For example, some cells, such as prokaryotes or red blood cells, do not have an ER of any kind. Cells that synthesize and release a lot of proteins would need a large amount of ER.
Can a cell live without endoplasmic reticulum?
Survival is difficult. The endoplasmic reticulum or ER are continuous membrane systems forming a layer of flattened sacs in the eukaryotic cells (cytoplasm). Consequently, in the absence of all these basic and essential cellular activities, the cells tend to die.
Is ER found in all living cells?
Endoplasmic reticulum is found in all living cells, except prokaryites and mature Red blood cells(RBC).
Do all cells have rough endoplasmic reticulum?
Rough ER is found throughout the cell but the density is higher near the nucleus and the Golgi apparatus. Ribosomes on the rough endoplasmic reticulum are called ‘membrane bound’ and are responsible for the assembly of many proteins.
Do yeast cells have endoplasmic reticulum?
Yeast cell contains different organelles surrounded by individual membranes, mostly the endoplasmic reticulum, the Golgi apparatus, and transport vesicles that are necessary for the manufacturing and trafficking of proteins, vacuoles, mitochondria, and microbodies.
Why do cells need the endoplasmic reticulum?
The endoplasmic reticulum (ER) serves important functions particularly in the synthesis, folding, modification, and transport of proteins. Proteins synthesized by the RER have specific final destinations, such as the cell membrane, cell exterior, or the ER itself.
What would happen if cells did not have endoplasmic reticulum?
Answer: Without the ER the cell is not able to synthesis new plasma membrane proteins, lysosomal enzymes, proteines for the Golgi apparatus and proteins for extracellular secretion. In the absence of these cellular mechanisms the cell would probably die.
Where is the endoplasmic reticulum located in a cell?
cytoplasm
The endoplasmic reticulum (ER) is a network of membrane-enclosed tubules and sacs (cisternae) that extends from the nuclear membrane throughout the cytoplasm (Figure 9.1). The entire endoplasmic reticulum is enclosed by a continuous membrane and is the largest organelle of most eukaryotic cells.
Which of the following is not a function of endoplasmic reticulum?
Which one of the following is not a function of Rough endoplasmic reticulum? Answer: Membrane biogenesis.
Do all proteins go to the endoplasmic reticulum?
In addition, a major portion of the cell’s protein synthesis occurs on the cytosolic surface of the ER: all proteins destined for secretion and all proteins destined for the ER itself, the Golgi apparatus, the lysosomes, the endosomes, and the plasma membrane are first imported into the ER from the cytosol.