Which of the following is FALSE about endocytotic movements?

• A. Phagocytosis could be used against invading microorganisms.
• B. Ingestion of plasma membrane along with extracellular fluid is a kind of pinocytosis.
• C. Phagocytosis is a means of feeding in some eukaryotes and is important in animal nutrition.
• D. The materials engulfed will be enclosed by a small portion of the ER membrane.

Answer: (D)

Verified step by step guidance

1. Understand the concept of endocytosis: Endocytosis is a cellular process in which substances are brought into the cell. It involves the engulfing of external materials by the cell membrane, forming a vesicle.
2. Differentiate between types of endocytosis: There are two main types of endocytosis - phagocytosis and pinocytosis. Phagocytosis involves the engulfing of large particles or microorganisms, while pinocytosis involves the ingestion of extracellular fluid and small molecules.
3. Clarify the role of phagocytosis: Phagocytosis is a mechanism used by certain cells to ingest and eliminate pathogens, and it is also a feeding method for some eukaryotic organisms, contributing to their nutrition.
4. Explain pinocytosis: Pinocytosis is a process where the cell ingests extracellular fluid and dissolved substances, which involves the plasma membrane forming small vesicles.
5. Identify the false statement: The statement that materials engulfed during endocytosis are enclosed by a small portion of the ER membrane is false. In reality, the materials are enclosed by the plasma membrane, not the ER membrane.