Ingestion of large molecules by animal cell is called

Options

A. Diffusion
B. Osmosis
C. Exocytosis
D. Endocytosis

Answer

To answer the question "Ingestion of large molecules by animal cell is called", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the process by which animal cells ingest large molecules. This is a specific cellular function related to how cells take in materials.

2. **Identifying the Options**: The options provided are:
- A) Diffusion
- B) Osmosis
- C) Exocytosis
- D) Endocytosis

3. **Analyzing Each Option**:
- **Diffusion**: This is the movement of molecules from an area of higher concentration to an area of lower concentration. It does not involve the ingestion of large molecules.
- **Osmosis**: This refers to the movement of water (solvent) across a selectively permeable membrane from an area of higher concentration to an area of lower concentration. This process also does not involve large molecules.
- **Exocytosis**: This is the process by which cells expel materials. It is the opposite of what the question is asking, which is about ingestion.
- **Endocytosis**: This is the process where cells engulf large molecules by enclosing them in a portion of the plasma membrane, which then pinches off to form a vesicle inside the cell.

4. **Conclusion**: Given the definitions and functions of each option, the correct answer to the question is **D) Endocytosis**. This process specifically refers to the ingestion of large molecules by animal cells.

### Final Answer:
The ingestion of large molecules by an animal cell is called **Endocytosis**.

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