Which cell organelle is concerned with glycosylation of protein?
- Endoplasmic reticulum
- Ribosome
- Mitochondria
- Peroxisome
Answer
(1) Endoplasmic reticulum
Solution
Proteins synthesised by ribosomes on the rough endoplasmic reticulum enter its lumen, where oligosaccharides are added (glycosylation).
⇒ As per NCERT, these proteins then pass to the Golgi apparatus, the important site of formation of glycoproteins and glycolipids, where they are further modified.
∴ Among the given organelles, glycosylation of proteins begins in the endoplasmic reticulum.
Answer: (1)