Question

What are the four major functions of the endoplasmic reticulum?

Answer 1

It plays a major role in the production, processing, and transport of proteins and lipids. The ER produces transmembrane proteins and lipids for its membrane and for many other cell components including lysosomes, secretory vesicles, the Golgi apparatus, the cell membrane, and plant cell vacuoles.

Answer 2

Answer:

The endoplasmic reticulum is the largest cell organelle that looks like membranous tubules and is a part of the endomembrane system.

Explanation:

There are two types of endoplasmic reticulum: Rough endoplasmic reticulum has ribosomes attached to it and the smooth endoplasmic reticulum does not have any ribosomes.

1. The endoplasmic reticulum has various functions:
2. Ribosomes are attached to the surface of the endoplasmic reticulum making it the major site of protein synthesis.
3. The rough Endoplasmic reticulum also helps in protein folding and sorting.
4. The smooth endoplasmic reticulum is the site of the production and synthesis of steroid hormones and lipids.

It is a major part of the endomembrane system along with the nucleus Golgi apparatus and lysosomes.