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The smooth endoplasmic reticulum is primarily composed of three-dimensional polygonal networks of tubules called cisternae. They are about 50 nm in diameter in mammals and 30 nm in diameter in yeast.
- What is the structure of the smooth endoplasmic reticulum?
- What is the structure and function of smooth endoplasmic reticulum?
- How big is the smooth endoplasmic reticulum in micrometers?
- How big is rough ER?
- What is smooth endoplasmic reticulum Class 9?
- How does the structure of the smooth ER aid in the function?
- How do rough and smooth ER compare structurally and functionally?
- What are rough and smooth endoplasmic reticulum?
- What is the size of the mitochondria in micrometers?
- What is the size of a mitochondria in nanometers?
- What is the size of the cell wall?
- What size are ribosomes?
- What is the size of the Golgi apparatus?
- Is ER bigger than mitochondria?
- Which of the following function is performed by smooth endoplasmic reticulum *?
- What structure makes new membranes for the cell?
What is the structure of the smooth endoplasmic reticulum?
The smooth endoplasmic reticulum comprises tube-like structure located near the cell periphery. These tubules or tubes sometimes branch forming a network that is reticular in appearance. The network of smooth endoplasmic reticulum allows for an increased surface area to be devoted to storage of key enzymes.
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 ...
How big is the smooth endoplasmic reticulum in micrometers?
We found the persistence length of the ER tubules to be 3.03 ± 0.24 μm, measured from both live and fixed cells.
How big is rough ER?
The membranes of the endoplasmic reticulum are 5 to 8 nm thick. The lumen of the RER is approximately 20 to 30 nm wide, whereas that of the SER is larger (30 to 60 nm).
What is smooth endoplasmic reticulum Class 9?
The smooth endoplasmic reticulum has a tubular form. It participates in the production of phospholipids, the chief lipids in cell membranes and are essential in the process of metabolism. Smooth ER transports the products of the rough ER to other cellular organelles, especially the Golgi apparatus.
How does the structure of the smooth ER aid in the function?
The smooth endoplasmic reticulum (smooth ER) is a membranous organelle found in most eukaryotic cells. ... 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.
How do rough and smooth ER compare structurally and functionally?
Describe the structural and functional distinctions between rough and smooth ER. The primary distinction between rough and smooth ER is the presence of bound ribosomes on the rough ER. ... The smooth ER also functions in detoxification, carbohydrate metabolism, and storage of calcium ions.
What are rough and smooth endoplasmic reticulum?
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 size of the mitochondria in micrometers?
Mitochondria are organelles typically ranging in size from 0.5 micrometer to 1 micrometer in length, found in the cytoplasm of eukaryotic cells.
What is the size of a mitochondria in nanometers?
Although the mitochondrial tubules can be several μm long, their diameter is typically between 200 and 700 nm, which is around the diffraction limit that restricts the attainable resolution in classical (fluorescence) microscopy (18; 19).
What is the size of the cell wall?
"Ranging from 5 to 80 nm in diameter, the walls of prokaryotic cells get their tensile strength from murein."
What size are ribosomes?
Ribosomes from various sources (prokaryotes, eukaryotic cytoplasm, mitochondria, chloroplasts, and kinetoplasts) vary in size from 20 to 30 nm in diameter, but all are composed of a large and a small subparticle or subunit and perform similar functions in protein synthesis.
What is the size of the Golgi apparatus?
The size and morphology of individual plant Golgi stacks vary tremendously between different cell types and species. The cisternal membranes and associated vesicles can be from 0.5 to 2.0 μm in diameter. Golgi stacks are usually composed of three to eight cisternae (Fig.
Is ER bigger than mitochondria?
In this cell type and growth conditions the reconstruction reveals that the mitochondria and lysosomes are more dominant in terms of volume than the ER.
Which of the following function is performed by smooth endoplasmic reticulum *?
The correct option is d) it helps detoxify the drugs
An important function of the SER is the detoxification of the body from the metabolic waste and drugs. The smooth endoplasmic reticulum contains enzymes which make lipid soluble drugs to dissolve in water so that they can be easily expelled from the body.
What structure makes new membranes for the cell?
How Are Cell Membranes Synthesized? Membranes and their constituent proteins are assembled in the ER. This organelle contains the enzymes involved in lipid synthesis, and as lipids are manufactured in the ER, they are inserted into the organelle's own membranes.
