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The cell organelle involved in glyco-sylation of protein is

1. ribosome
2. peroxisome
3. endoplasmic reticulum
4. mitochondria

Correct answer: endoplasmic reticulum

Solution

The endoplasmic reticulum, especially the rough ER, is the site where many proteins undergo initial glycosylation and other early modifications. Ribosomes make proteins, peroxisomes handle oxidation, and mitochondria produce ATP.

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