The endoplasmic reticulum is, in essence, the transportation system of the eukaryotic cell, and has many other important functions such as protein folding. It is a type of organelle made up of two subunits – rough endoplasmic reticulum, and smooth endoplasmic reticulum.

What is the endoplasmic reticulum function?

The endoplasmic reticulum (ER) is the largest membrane-bound organelle in eukaryotic cells and performs a variety of essential cellular functions, including protein synthesis and processing, lipid synthesis, and calcium (Ca²⁺) storage and release.

What is endoplasmic reticulum short answer?

The endoplasmic reticulum (ER) is a continuous membrane system that forms a series of flattened sacs within the cytoplasm of eukaryotic cells. All eukaryotic cells contain an ER. In animal cells, the ER usually constitutes more than half of the membranous content of the cell.

What is the main function of rough endoplasmic reticulum?

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 four major functions of the endoplasmic reticulum?

• synthesis of proteins, carbohydrates and lipids.
• storage of absorbed or synthesized molecules.
• transport of materials.
• detoxification of drugs and toxins.

The Endoplasmic Reticulum - The transportation system of the cell

42 related questions found

What is ER write any five functions of ER?

The ER is the largest organelle in the cell and is a major site of protein synthesis and transport, protein folding, lipid and steroid synthesis, carbohydrate metabolism and calcium storage [1–7].

Which of the following is not a function of ER?

Which one of the following is not a function of Rough endoplasmic reticulum? Answer: Membrane biogenesis.

Does rough endoplasmic reticulum have ribosomes?

Rough endoplasmic reticulum, (RER), has large numbers of ribosomes attached to the outer surfaces of the lamella membranes. These ribosome-rich areas play an important role in the production, storage and export of proteins.

Which of the following is found in the rough endoplasmic reticulum?

Rough endoplasmic reticulum contains ribosomes which are also called 'membrane-bound' and for many proteins, they are responsible for their assembly.

What is the relationship between ribosomes and rough endoplasmic reticulum?

Rough ER is a host for ribosomes that continually attach to and detach from the ER surface. Essentially, the endoplasmic reticulum and ribosomes work together in order to synthesize proteins and have them transported to their final destination.

When was the endoplasmic reticulum discovered?

Discovery of Endoplasmic Reticulum (ER):

It was discovered independently by Porter (1945) and Thompson (1945). The name was given by Porter in 1953. Endoplasmic reticulum is a 3-dimensional, complicated and interconnected syncrri of membrane-lined channels that run through the cytoplasm.

What is endoplasmic reticulum function Wikipedia?

The functions of the endoplasmic reticulum can be summarized as the synthesis and export of proteins and membrane lipids, but varies between ER and cell type and cell function.

What is the endoplasmic reticulum made of?

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.

How was the endoplasmic reticulum discovered?

The history of the endoplasmic reticulum began in 1945 when Porter, Claude, and Fullam [1] observed vesicle-like bodies in cell culture studies using electron microscopy.

What is endoplasmic reticulum give its types and function?

The two types of endoplasmic reticulum are : Rough Endoplasmic Reticulum: Their main function is produce proteins in the cells and ribosomes are attached to their surface. Smooth Endoplasmic Reticulum: Their main function is to produce lipids and also detoxify toxins in the body in the liver and kidney cells.

What are the two types of endoplasmic reticulum and what are their functions?

The two types of endoplasmic reticulum in cells are rough ER and smooth ER. They have separate functions but work together to process protein molecules in the cell.

Where is Golgi apparatus located?

The Golgi body is a portion of the cell that's made up of membranes, and there's different types of membranes. Some of them are tubules, and some of them are vesicles. The Golgi is located right near the nucleus. It's called a perinuclear body, and it's actually right near the endoplasmic reticulum as well.

Where are ribosomes found?

Ribosomes are found 'free' in the cytoplasm or bound to the endoplasmic reticulum (ER) to form rough ER. In a mammalian cell there can be as many as 10 million ribosomes. Several ribosomes can be attached to the same mRNA strand, this structure is called a polysome. Ribosomes have only a temporary existence.

Why are some ribosomes attached to the endoplasmic reticulum?

Those floating ribosomes make proteins that will be used inside of the cell. Other ribosomes are found on the endoplasmic reticulum. Endoplasmic reticulum with attached ribosomes is called rough ER. ... The attached ribosomes make proteins that will be used inside the cell and proteins made for export out of the cell.

Does smooth endoplasmic reticulum have Cisternae?

The double membranes of smooth and rough ER form sacs called cisternae. Protein molecules are synthesized and collected in the cisternal space/lumen. ... Smooth ER (SER) acts as a storage organelle. It is important in the creation and storage of lipids and steroids.

Does nucleolus make ribosomes?

The most prominent substructure within the nucleus is the nucleolus (see Figure 8.1), which is the site of rRNA transcription and processing, and of ribosome assembly. ... The nucleolus is a ribosome production factory, designed to fulfill the need for large-scale production of rRNAs and assembly of the ribosomal subunits.

What is the difference between free ribosomes and ribosomes bound to the rough?

Two types of ribosomes are found in the cytoplasm. They are free form or bound (attached) form. The key difference between free and attached ribosomes is that free ribosomes are not attached and freely located in the cytoplasm while attached ribosomes are attached to the endoplasmic reticulum.

Which of the following does not occur in the endoplasmic reticulum?

your answer is b) phospholipid synthesis does not occur in rough endoplasmic reticulum. phospholipid synthesis occurs in smooth endoplasmic reticulum.

Which is not related to endoplasmic reticulum?

Mitochondria is the site of energy generation. It is not generated in the endoplasmic reticulum. So, the correct answer is option C.

What is the purpose of the Golgi apparatus?

The Golgi apparatus transports and modifies proteins in eukaryotic cells. How have scientists studied dynamic protein movements through the Golgi? The Golgi apparatus is the central organelle mediating protein and lipid transport within the eukaryotic cell.