Major site of protein glycosylation is: (A) ER and golgi body, (B) Ribosome and golgi body, (C) ER and ribosome, (D) Ribosome and cytoplasm
Answer is A. Because many glycosylation reactions occur within the lumen of the Golgi apparatus, carrier systems (permeases and transpoers) are required to transpo nucleotide sugars across the Golgi membrane.Ref: Harpers Illustrated Biochemistry, 30th edition, page no: 572