Which of the following statements best describes the functional characteristics of lysosomes ?

Options

A. They function at alkaline pH
B. They function only within the intracellular compartment
C. They contain enzymes that lack macro molecular specificity
D. Provide nourishment during starvation

Answer

### Step-by-Step Solution:

1. **Understanding Lysosomes**: Lysosomes are membrane-bound organelles found in eukaryotic cells. They contain digestive enzymes that break down waste materials and cellular debris.

2. **Evaluating the Statements**:
- **Statement 1**: "They function at the alkaline pH."
- This is incorrect. Lysosomes function optimally at an acidic pH, not alkaline.

- **Statement 2**: "They function only within the intracellular compartments."
- This is also incorrect. While lysosomes primarily function within cells, they are involved in extracellular digestion as well.

- **Statement 3**: "They contain enzymes that lack macromolecule specificity."
- This statement is incorrect. The enzymes in lysosomes are specific and target particular macromolecules (e.g., lipases for lipids, proteases for proteins).

- **Statement 4**: "They provide nourishment during starvation."
- This statement is correct. Lysosomes can break down cellular components to provide nutrients during periods of starvation, acting as a source of nourishment.

3. **Conclusion**: After evaluating all statements, the statement that best describes the functional characteristics of lysosomes is the fourth one: "They provide nourishment during starvation."

### Final Answer:
The statement that best describes the functional characteristics of lysosomes is: **"They provide nourishment during starvation."**

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