State whether the following statement is true or false. The ability of plasma membrane to engulf macromolecules is known as pinocytosis.
A. True
B. False

Answer

To determine whether the statement "The ability of plasma membrane to engulf macromolecules is known as pinocytosis" is true or false, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Term Pinocytosis**:
- Pinocytosis refers to the process by which cells ingest liquid and small particles. It is often described as "cell drinking" and involves the formation of small vesicles that capture extracellular fluid.

2. **Identify the Process for Engulfing Macromolecules**:
- The process by which cells engulf larger particles or macromolecules is known as phagocytosis, which is a form of endocytosis. Phagocytosis is often referred to as "cell eating."

3. **Differentiate Between Pinocytosis and Phagocytosis**:
- While pinocytosis deals with the uptake of liquids and small solutes, phagocytosis specifically involves the engulfing of larger particles or macromolecules.

4. **Evaluate the Statement**:
- The statement claims that the ability of the plasma membrane to engulf macromolecules is known as pinocytosis. Since pinocytosis is not the correct term for this process, the statement is false.

5. **Conclusion**:
- Based on the definitions and distinctions made, the correct answer to the question is B. False.

### Final Answer:
B. False

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