- What is the main function of ribosome?
- What proteins are synthesized in the rough ER?
- Is Er important for membrane biosynthesis?
- What is the structure of ER?
- Who discovered ribosomes?
- What does the endoplasmic reticulum do easy definition?
- Why RER membrane is rough in nature?
- What are the three functions of smooth endoplasmic reticulum?
- Do bacteria have ER?
- How is RER different from Ser How do these two differ in their functions mention how these two come together for the synthesis of a major part of the cell?
- What is the structure of rough ER?
- Who discovered ER?
- What is difference between smooth and rough endoplasmic reticulum?
- What is RER and SER?
- What is the function of RER Class 9?
- What is the main function of RER?
- What are the main function of endoplasmic reticulum?
- What membrane is connected to rough ER?
- What is the structure and function of smooth endoplasmic reticulum?
- Why is RER more stable than ser?
- What are the similarities between rough and smooth ER?
What is the main function of ribosome?
Ribosomes have two main functions — decoding the message and the formation of peptide bonds.
These two activities reside in two large ribonucleoprotein particles (RNPs) of unequal size, the ribosomal subunits.
Each subunit is made of one or more ribosomal RNAs (rRNAs) and many ribosomal proteins (r-proteins)..
What proteins are synthesized in the rough ER?
Proteins called reticulons and DP1/Yop1p play an important role in this stabilization. These proteins are integral membrane proteins that form oligomers to shape the lipid bilayer. In addition, they also use a structural motif that gets inserted into one leaflet of the membrane and increases its curvature.
Is Er important for membrane biosynthesis?
It helps in manufacturing of lipids and fat molecules. … Endoplasmic reticulum synthesizes lipids (smooth endoplasmic reticulum) and proteins (rough endoplasmic reticulum) which are responsible for formation of membrane. Thus, they help in membrane biogenesis.
What is the structure of ER?
The general structure of the endoplasmic reticulum is a network of membranes called cisternae. These sac-like structures are held together by the cytoskeleton. The phospholipid membrane encloses the cisternal space (or lumen), which is continuous with the perinuclear space but separate from the cytosol.
Who discovered ribosomes?
George E. PaladeThe ribosome is a complex molecule made of ribosomal RNA molecules and proteins that form a factory for protein synthesis in cells. In 1955, George E. Palade discovered ribosomes and described them as small particles in the cytoplasm that preferentially associated with the endoplasmic reticulum membrane.
What does the endoplasmic reticulum do easy definition?
Endoplasmic reticulum (ER) is a cellular organelle. It is the transport network for molecules going to specific places, as compared to molecules that float freely in the cytoplasm. … Rough endoplasmic reticulum (RER), so called because it is studded with ribosomes, and secretes proteins into the cytoplasm.
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).
What are the three functions of smooth endoplasmic reticulum?
Its main functions are the synthesis of lipids, steroid hormones, the detoxification of harmful metabolic byproducts and the storage and metabolism of calcium ions within the cell. The smooth ER is distinguished from the other parts of the endoplasmic reticulum by the absence of membrane-bound ribosomes.
Do bacteria have ER?
many membrane bound organelles- lysosomes, mitochondria (with small ribosomes), golgi bodies, endoplasmic reticulum, nucleus. … Bacteria, of course, have no nucleus and therefore also nuclear membrane.
How is RER different from Ser How do these two differ in their functions mention how these two come together for the synthesis of a major part of the cell?
Answer. RER is the rough endoplasmic reticulum which has ribosomes attached on it’s surface whereas SER is the smooth endoplasmic reticulum which doesn’t have any other material attaxhed to its surface. SER plays a crucial role in detoxifying poisons .
What is the structure of rough ER?
Rough endoplasmic reticulum is an organelle found in eukaryotic cells. Its main function is to produce proteins. It is made up of cisternae, tubules and vesicles. The cisternae are made up of flattened membrane disks, which are involved in the modification of proteins.
Who discovered ER?
Keith PorterThe endoplasmic reticulum is one of the most intriguing and fascinating organelles. It is found in all eukaryotic cells and performs an amazing number of different functions. The organelle was named by Keith Porter in 1953 on the basis of observations made with the electron microscope on tissue culture cells.
What is difference between smooth and rough endoplasmic reticulum?
The most basic difference between RER and SER is the presence of ribosomes. When ribosomes attach to the surface of an ER, it gives a characteristic rough appearance; hence it is called Rough ER. On the other hand, a smooth ER does not have ribosomes on its surface. It possesses ribosomes attached to its membrane.
What is RER and SER?
Quick look. Rough ER (RER) is involved in some protein production, protein folding, quality control and despatch. It is called ‘rough’ because it is studded with ribosomes. Smooth E R (SER) is associated with the production and metabolism of fats and steroid hormones.
What is the function of RER Class 9?
It transports materials between the regions of cytoplasm or between the cytoplasm and nucleus. It also provides a surface for some biochemical activities of cell. It can be classified into two types: RER (Rough Endoplasmic Reticulum)
What is the main function of RER?
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 are the main function of endoplasmic reticulum?
The endoplasmic reticulum (ER) is a large, dynamic structure that serves many roles in the cell including calcium storage, protein synthesis and lipid metabolism. The diverse functions of the ER are performed by distinct domains; consisting of tubules, sheets and the nuclear envelope.
What membrane is connected to rough ER?
Rough ER is named for its rough appearance, which is due to the ribosomes attached to its outer (cytoplasmic) surface. Rough ER lies immediately adjacent to the cell nucleus, and its membrane is continuous with the outer membrane of the nuclear envelope.
What is the structure and function of smooth endoplasmic reticulum?
Smooth endoplasmic reticulum (SER), meshwork of fine disklike tubular membrane vesicles, part of a continuous membrane organelle within the cytoplasm of eukaryotic cells, that is involved in the synthesis and storage of lipids, including cholesterol and phospholipids, which are used in the production of new cellular …
Why is RER more stable than ser?
The surface of RER contains two types of glycoproteins (ribophorin I and II) for attachment of ribosomes. RER composed of mainly cisternae; tubules are very few. … RER is more stable than SER. RER is basophilic due to presence of ribosome.
What are the similarities between rough and smooth ER?
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. Rough ER is called rough because it has ribosomes attached to its surface.