Why would treating cells with a drug that inhibits

1)Why would treating cells with a drug that inhibits the enzymes that transfer sugar residues to proteins keep proteins from moving through the ER-Golgi pathway?

2) In an experiment, you have treated cells with a drug that inhibits the ezymes that place glycosylation trees onto proteins. When you look for you protein, you find it in the rough endoplasmic reticulum but nowhere else. Explain this result.

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