試題詳解

32. Exocytosis contributes to both secretion and plasma membrane homeostasis. Which of the following statements is correct regarding exocytosis?

(1) Constitutive exocytosis occurs in all eukaryotic cells and does not require a specific sorting signal in cargo proteins.

(2) Regulated exocytosis depends on Ca2+-triggered membrane fusion events.

(3) SNARE proteins provide specificity and energy for vesicle fusion by forming trans-SNARE complexes.
(A) (1) only.
(B) (2) only.
(C) (1) and (3).
(D) (2) and (3).
(E) All of the above are correct.