What Is Difference Between Rough And Smooth ER?

Where is the rough ER located?

Rough ER lies immediately adjacent to the cell nucleus, and its membrane is continuous with the outer membrane of the nuclear envelope.

The ribosomes on rough ER specialize in the synthesis of proteins that possess a signal sequence that directs them specifically to the ER for processing..

Can smooth ER produce ATP?

The smooth ER, on the other hand, is concerned with lipid synthesis, carbohydrate metabolism and Ca2+ storage. … Remarkably, both the size and charge of the nucleotide, as well as the ER’s inability to generate ATP by itself, make a specific mechanism for its transport into the lumen necessary.

What is the difference between the rough and smooth endoplasmic reticulum quizlet?

What is the difference between rough endoplasmic reticulum and smooth endoplasmic reticulum? Rough endoplasmic reticulum is covered in ribosomes and is involved in the synthesis and production of proteins. Smooth endoplasmic reticulum has no ribosomes and is involved in the production of enzymes and lipids.

What is the function of the RER and SER?

RER helps in the formation of proteins in the cell. The presence of ribosomes is actually responsible for the synthesis of the proteins by the RER….RER-Rough Endoplasmic ReticulumSER-Smooth Endoplasmic ReticulumTheir function is to synthesize proteins.Their function is to synthesize lipids.6 more rows

What would happen without the smooth ER?

The smooth ER has an important role in lipid and steroid synthesis, it is a storage for intracellular calcium as well. Without the RER the cell is not able to synthesis new plasma membrane proteins, lysosomal enzymes, proteines for the Golgi apparatus and proteins for extracellular secretion.

What is the structure of the rough ER?

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.

Can rough ER produce ATP?

Enzymes in the inner mitochondrial membrane and central matrix carry out the terminal stages of sugar and lipid oxidation coupled to ATP synthesis. … Secretory proteins and membrane proteins are synthesized on the rough endoplasmic reticulum, a network of interconnected membrane vesicles studded with ribosomes.

What does the smooth ER do?

The smooth endoplasmic reticulum functions in many metabolic processes. It synthesizes lipids, phospholipids as in plasma membranes, and steroids. Cells that secrete these products, such as cells of the testes, ovaries, and skin oil glands, have an excess of smooth endoplasmic reticulum.

Which of the following properly summarizes the differences between the rough and smooth endoplasmic reticulum?

A. What is the difference between the rough and smooth ER? Rough ER’s have ribosomes on the surface and produce large amounts of proteins for export. Smooth ER’s contain a collection of specialized enzymes and does not have ribosomes on its surface.

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.

Why RER membrane is rough in nature?

It possesses rough walls because the ribosomes remain attached to its membranes. On their membranes, rough ER (RER) contains certain ribosome specific, transmembrane glycoproteins, called ribophorins I and II, to which are attached the ribosomes while engaged in polypeptide synthesis.