Question

which type of of endoplasmic rectum associated with ribosomes
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Answer 1

AnSwEr

In eukaryotes, rough endoplasmic reticulum (RER) bear ribosomes on their surface. The attachment between ribosomes and endoplasmic reticulum is through a hydrophobic signal recognition particle or SRP linked to 60S subunit of ribosome and SRP receptor or ribophorin present over the ER.

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Answer 2

Rough endoplasmic reticulum (RER) carry ribosomes on their surface and are involved in the process of protein synthesis.The secretory proteins are synthesized on ribosomes which are present on the surface of endoplasmic reticulum. The cytoplasmic proteins are synthesized by cytoplasmic ribosomes. After synthesis on RER, the secretory proteins are pinched off in minute vesicles which carry secretory proteins to the Golgi apparatus. The secretory proteins are processed in the Golgi apparatus and finally secreted on the plasma membrane surface. Conjugate proteins, like glycoproteins are also synthesized in Golgi apparatus.