M.C.Q.
Glycosylation of protein molecules occurs in 
(A) Rough endoplasmic reticulum
(B) Smooth endoplasmiuc reticulum
(C) Cytoplasm
(D) Golgi bodies

Dear student,
Glycosylation of protein molecule occurs in the rough endoplasmic reticulum and golgi complex. Proteins synthesised on the rough endoplasmic reticulum are pulled inside the lumen where signal sequences are cleaved by signal peptidase. Glycosylation of protein is required for proper folding of the protein. Some of the modification happens in the rough endoplasmic reticulum and the remaining modification occurs in golgi apparatus.

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ROUGH ENDOPLASMIC RETICULUM AND GOLGI COMPLEX
So, the answers are option a) and d)
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golgi bodies
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option a)
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