All cells have a cell wall that regulates the passage of molecules into and out of the cell.

Answer

**Step-by-Step Solution:**

1. **Understanding the Statement**: The statement claims that "all cells have a cell wall that regulates the passage of molecules into and out of the cell." We need to analyze if this statement is true or false.

2. **Identifying Cell Types**: There are two primary types of cells: plant cells and animal cells.

3. **Cell Wall Presence**:
- Plant cells have a cell wall that provides structure and protection.
- Animal cells do not have a cell wall; they only have a plasma membrane.

4. **Function of the Cell Wall**:
- The cell wall in plant cells is permeable, meaning it allows various molecules to pass through freely.
- However, the regulation of the passage of molecules is primarily the role of the plasma membrane.

5. **Plasma Membrane Characteristics**:
- The plasma membrane is semi-permeable, which means it selectively allows certain molecules to enter or exit the cell while restricting others.

6. **Conclusion**: Since not all cells possess a cell wall (specifically, animal cells do not), the statement is false. The regulation of molecular passage is mainly performed by the plasma membrane in both plant and animal cells.

**Final Answer**: The statement is false because not all cells have a cell wall; only plant cells do. Animal cells rely on the plasma membrane for regulating the passage of molecules.

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