Question

Distinguish between smooth and rough endoplasmic reticulum​

Answer 1

Explanation:

The most basic difference between RER and SER 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. It possesses ribosomes attached to its membrane.

Answer 2

Answer:

Rough Endoplasmic Reticulum:

• It possesses ribosomes attached to its membrane.

• Formed of cisternae and a few tubules.

• It participates in the synthesis of enzymes and proteins.

• It helps in the formation of lysosomes.

• It is internal and connected with the nuclear envelope.

• Ribophorins are present and help ribosomes attach to ER.

• It might develop from the nuclear envelope .

• Provides proteins and lipids for Golgi apparatus.

Smooth Endoplasmic Reticulum:

• It does not have ribosomes on its membrane.
• Formed of vesicles and tubules.
• Synthesises glycogen, lipids and steroids.
• Gives rise to Spherosomes/ Oleosomes .
• It is peripheral and may be connected to plasmalemma.
• Devoid of Ribophorins.
• Develops from Rough Endoplasmic Reticulum.
• Provides vesicles for cis-face of Golgi apparatus.