Question

Differenciat between smooth and rough endoplasmic reticulum on the basis of it's structure and function

Answer 1

Both the smooth and rough endoplasmic reticulum help in the production and storage of proteins The main difference is that one contains ribosomes on it and the other does not.

The rough endoplasmic reticulum (RER) has ribosomes on its surface. This is what give the RER a "rough" appearance. Rough ER looks like sheets.The RER synthesizes (makes) and packages proteins. The RER is attached to the nuclear membrane. The Golgi apparatus tends to be on the other side of the RER. 

The smooth endoplasmic reticulum (SER) does not contain ribosomes.  The Smooth ER looks more like tubes. The SER helps in the storage of proteins and lipids. Cells that produce oils have a higher ratio of SERs than do other cells. The smooth endoplasmic reticulum can be found dispersed throughout the cytoplasm of the cell. 

Answer 2

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ur answer is. ......
Smooth Endoplasmic Reticulum:-

1. SER is not associated with ribosomes.

2. These are mainly composed of tubules.

3. Generally, these are associated with plasma membrane.

4. Main function is lipid synthesis and hence mostly seen in cells associated with synthesis of steroid hormones.

Rough Endoplasmic Reticulum:-

1. RER is studded with ribosomes.

2. These are mainly composed of cisternae.

3. Generally associated with nuclear membrane.

4. Main function is protein synthesis and hence mostly seen in cells associated with secretion of proteins.
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