question_answer 40)

  Differentiate between Rough Endoplasmic Reticulum (RER) and Smooth Endoplasmic Reticulum (SER).

Answer:

                  Difference between Rough Endoplasmic Reticulum (RER) and Smooth EndoplasmicReticulum (SER) are as below

	RER (Rough Endoplasmic Reticulum)	SER (Smooth Endoplasmic Reticulum)
1.	RER possesses ribosomes attached to its surface.	SER does not bear ribosomes attach to their surface.
2.	Mainly formed of dsternae and few. tubules.	Mainly formed of vesicles and the tubules.
3.	RER takes part in the synthesis of proteins and enzymes.	SER takes part in the synthesis of glycogen, lipids and steroids.
4.	RER is internal and connected with nuclear envelope.	SER is peripheral. It may be connected with plasmalemma.
5.	It may develop from the nuclear envelope.	It may develop from RER.
6.	Enzymes for detoxification are absent in RER	It has the enzymes for detoxification.
7.	It forms lysosomes through the agency of Golgi apparatus.	SER gives rise to sphaerosomes.