Question

What is the difference between rough and smooth endoplasmic reticulum in a cell

Answer 1

The most basic difference between Smooth Endoplasmic Reticulum And Rough Endoplasmic Reticulum is the presence of Ribosomes. When ribosomes attach to the surface of an ER, it gives a characteristic rough appearance, hence it is called Rough ER. On the other hand, a smooth ER does not have ribosomes on its surface. 

Answer 2

. RER possesses ribosomes attached to its membranes.

2. It is mainly formed of cisternae and a few tubules.

3. The reticulum takes part in the synthesis of proteins and enzymes.

4. It helps in the formation of lysosomes through the agency of Golgi apparatus.

5. RER possesses narrow pores below its ribosomes for the passage of synthesized polypeptides into ER channels.

. It is engaged in the synthesis of glycogen, lipids and steroids.

4. SER gives rise to sphareosomes.

5. Pores are absent so that materials synthesized by SER do not pass into its channels.

6. SER is often peripheral. It may be connected with plasma lemma.


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