Multiple Choice
Which of the following best describes the processes of endocytosis and exocytosis?
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6. The Membrane
Endocytosis and Exocytosis
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What is the key difference between phagocytosis and pinocytosis?
A
Phagocytosis occurs only in plant cells, while pinocytosis occurs only in animal cells.
B
Phagocytosis is a form of exocytosis, whereas pinocytosis is a form of endocytosis.
C
Phagocytosis involves the ingestion of large particles, while pinocytosis involves the ingestion of liquids and small molecules.
D
Phagocytosis requires energy, whereas pinocytosis does not.
Verified step by step guidance1
Understand the context: Both phagocytosis and pinocytosis are types of endocytosis, a process where cells engulf external substances.
Identify the nature of substances involved: Phagocytosis involves the ingestion of large particles such as bacteria or dead cells, while pinocytosis involves the ingestion of liquids and small molecules.
Clarify the misconception: Both processes occur in animal cells, and neither is exclusive to plant cells.
Differentiate the processes: Phagocytosis is often referred to as 'cell eating' due to the large size of particles ingested, whereas pinocytosis is known as 'cell drinking' because it involves fluids and dissolved substances.
Energy requirement: Both phagocytosis and pinocytosis require energy in the form of ATP, as they are active transport processes.
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