What is the full form of RER?

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 meaning of 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 on the 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 is RER are formed of?

The rough endoplasmic reticulum (also called the RER), is an organelle found in both animal and plant cells. It is made up of interconnected, flattened membrane sacs. It’s also attached to the nuclear membrane, which contains the nucleus.

What is rough endoplasmic reticulum Class 9?

Rough Endoplasmic Reticulum Structure The rough endoplasmic reticulum is named so because of its appearance. It is a series of connected flattened sacs having several ribosomes on its outer surface, hence the name. It synthesizes and secretes proteins in the liver, hormones and other substances in the glands.

Who first discovered endoplasmic reticulum?

Keith Porter
ER discovered by Emilio Veratti in the year of 1902 as Sarcoplasmic Reticulum in muscle fibers which is similar to ER in other cells (Veratti, 1961). Fifty years later, this new organelle was first visualized through electron microscopy (EM) by Keith Porter and termed it as “endoplasmic reticulum” (Porter, 1953).

What is the full form of ER in biology?

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 is the size of a 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 are ribosomes Class 11?

Ribosomes are the granular structures composed of ribonucleic acid (RNA) and proteins. The eukaryotic ribosomes are 80S, while the prokaryotic ribosomes are 70S, made up of two subunits. ‘S’ stands for the sedimentation coefficient, which is indirectly is a measure of density and size.

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