Definition of dissatisfaction noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.
SUMMARY. 1  Endoplasmic reticulum is an organelle found in both eukaryotic animal and plant cells. 2  The rough ER, studded with millions of membrane bound ribosomes, is involved with the production, folding, quality control and despatch of some proteins.
The endoplasmic reticulum is a membrane system of folded sacs and interconnected channels that serves as a site for protein and lipid synthesis. The various folds of the endoplasmic reticulum provide a large surface where cellular functions can take place. There are two types of endoplasmic reticulum: smooth and rough. Rough endoplasmic reticulum is a form of endoplasmic reticulum that is studded with ribosomes. Since it has ribosomes stuck all over it, it has a bumpy appearance and is therefore called rough endoplasmic reticulum.