Multiple Choice
Which process eliminates substances from cells by packaging them into vesicles that fuse with the plasma membrane?
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6. The Membrane
Endocytosis and Exocytosis
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Endocytosis moves materials _____ a cell via _____.
A
out of; active transport pumps
B
into; vesicle formation
C
into; protein channels
D
out of; vesicle fusion
Verified step by step guidance1
Step 1: Understand the concept of endocytosis. Endocytosis is a cellular process where materials are brought into the cell by engulfing them in a vesicle formed from the plasma membrane.
Step 2: Compare endocytosis with exocytosis. Exocytosis is the opposite process, where materials are moved out of the cell via vesicle fusion with the plasma membrane.
Step 3: Analyze the options provided. The correct mechanism for endocytosis involves vesicle formation, which is a key feature of this process.
Step 4: Eliminate incorrect options. For example, 'out of; active transport pumps' and 'out of; vesicle fusion' describe processes that move materials out of the cell, not into it. Similarly, 'into; protein channels' does not describe vesicle formation, which is specific to endocytosis.
Step 5: Conclude that the correct answer is 'into; vesicle formation,' as this accurately describes the process of endocytosis.
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