[Campbell Biology P.188] Based on Figure 7.20 and the accompanying text, what is the correct... | Practice Question

Based on Figure 7.20 and the accompanying text, what is the correct sequence of events during exocytosis?

• A: 1. A vesicle containing secretory proteins buds off from the Golgi. 2. The vesicle travels along a microtubule to the plasma membrane. 3. The outside of the vesicle binds to the inside of the plasma membrane. 4. The two membranes fuse, releasing the proteins outside the cell. 5. The vesicle membrane becomes part of the plasma membrane.
• B: 1. The vesicle travels along a microtubule to the plasma membrane. 2. A vesicle containing secretory proteins buds off from the Golgi. 3. The outside of the vesicle binds to the inside of the plasma membrane. 4. The two membranes fuse, releasing the proteins outside the cell. 5. The vesicle membrane becomes part of the plasma membrane.
• C: 1. A vesicle containing secretory proteins buds off from the Golgi. 2. The outside of the vesicle binds to the inside of the plasma membrane. 3. The vesicle travels along a microtubule to the plasma membrane. 4. The two membranes fuse, releasing the proteins outside the cell. 5. The vesicle membrane becomes part of the plasma membrane.
• D: 1. The two membranes fuse, releasing the proteins outside the cell. 2. A vesicle containing secretory proteins buds off from the Golgi. 3. The outside of the vesicle binds to the inside of the plasma membrane. 4. The vesicle travels along a microtubule to the plasma membrane. 5. The vesicle membrane becomes part of the plasma membrane.