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Multiple Choice
Which of the following is a correct statement regarding exocytosis and endocytosis?
A
Exocytosis and endocytosis are passive transport mechanisms that do not require energy.
B
Exocytosis involves the uptake of materials into the cell, while endocytosis involves the release of materials from the cell.
C
Endocytosis is the process by which cells internalize molecules by engulfing them, while exocytosis is the process of expelling materials from the cell.
D
Both exocytosis and endocytosis require energy in the form of ATP.
Verified step by step guidance
1
Understand the definitions: Exocytosis is the process by which cells expel materials, while endocytosis is the process by which cells internalize materials by engulfing them.
Recognize that both exocytosis and endocytosis are active transport mechanisms, meaning they require energy input.
Identify the source of energy: Both processes require energy in the form of ATP (adenosine triphosphate) to facilitate the movement of materials across the cell membrane.
Differentiate between the two processes: In exocytosis, vesicles containing materials fuse with the plasma membrane to release their contents outside the cell. In endocytosis, the cell membrane engulfs external materials, forming a vesicle to bring them into the cell.
Conclude that the correct statement is that both exocytosis and endocytosis require energy in the form of ATP, and they involve the expulsion and uptake of materials, respectively.