How big is the endoplasmic reticulum in micrometers?
How big is the endoplasmic reticulum in micrometers?
Reticulum (in most plant cells) 0.5 µm thick (each layer) 7. 8. 1 x 1 µm (membranes have thickness of ER) 9.
What is the size and shape of the rough endoplasmic reticulum?
Rough and Smooth. There are two basic types of ER. Both rough ER and smooth ER have the same types of membranes but they have different shapes. Rough ER looks like sheets or disks of bumpy membranes while smooth ER looks more like tubes.
Can you see the endoplasmic reticulum with a light microscope?
The detailed structure of the rough endoplasmic reticulum can’t be studied by light microscopy. However, the abundance of membrane-bound ribosomes makes areas of rER extremely basophilic and therefore visible, especially in cells that are highly secretory.
How many ER are in a cell?
There are two types of endoplasmic reticulum: rough endoplasmic reticulum (rough ER) and smooth endoplasmic reticulum (smooth ER). Both types are present in plant and animal cells. The two types of ER often appear as if separate, but they are sub-compartments of the same organelle.
What’s the difference between rough ER and smooth ER?
The main difference between these two terminologies is that the Smooth Endoplasmic Reticulum is known for stocking the lipids and proteins. It is not bounded by ribosomes. Whereas, the Rough Endoplasmic Reticulum is bounded by the ribosomes and also stores proteins.
Are ribosomes constantly fixed to any structure?
A ribosome is not permanently affixed to one spot on the ER, but rather repeatedly attaches and detaches during the protein-making process. The function of the attached ribosomes is to create proteins for use by the cell membrane or for export to other parts of the body.
What is the structure and function of the rough ER?
The endoplasmic reticulum can either be smooth or rough, and in general its function is to produce proteins for the rest of the cell to function. The rough endoplasmic reticulum has on it ribosomes, which are small, round organelles whose function it is to make those proteins.
What is RER and its function?
Rough endoplasmic reticulum (RER), series of connected flattened sacs, part of a continuous membrane organelle within the cytoplasm of eukaryotic cells, that plays a central role in the synthesis of proteins.
What is the rough ER made up of?
The rough endoplasmic reticulum is largely made of sheets – a two-dimensional array of flattened sacs that extend across the cytoplasm. In addition to ribosomes, these membranes contain an important protein complex called the translocon, which is necessary for protein translation within the rough ER.
Why RER membrane is rough in nature?
RER or Rough Endoplasmic Reticulum is rough in nature due to the presence of ribosomes, which are attached to its surface. Endoplasmic reticulum can be of two forms- the rough endoplasmic reticulum( RER) and the smooth endoplasmic reticulum( SER).