Proteins and lipids are converted into glycolipids and glycoproteins by adding carbohydrates by___________? August 9, 2021May 11, 2018 by admin Proteins and lipids are converted into glycolipids and glycoproteins by adding carbohydrates by___________? A. Ribosomes B. Cytoplasm C. Golgi apparatus D. Endoplasmic reticulum