In the context of endocytic pathways, are endocytosis and exocytosis considered forms of passive transport or active transport?

• A. Both are active transport processes because they require energy for vesicle formation, trafficking, and membrane fusion.
• B. Both are passive transport processes because materials move down their concentration gradients without energy input.
• C. Endocytosis is active transport, but exocytosis is passive transport.
• D. Endocytosis is passive transport, but exocytosis is active transport.

Answer: (A)