The statements below outline some of the stages involved in exocytosis of glycoprotein molecules. 1. The Golgi body membrane folds in around glycoprotein molecules. 2. The vesicle attaches to, then fuses with, the cell surface membrane. 3. A vesicle linked to microtubules travels through the cytoplasm. 4. A secretory vesicle is formed. Which sequence of events is correct for exocytosis?
- A1 → 4 → 2 → 3
- B1 → 4 → 3 → 2
- C2 → 3 → 1 → 4
- D4 → 1 → 3 → 2