Select the false statement

Options

A. Ribosomes and centriole are non- membrane bound organelles of a cell
B. Ribosomes are enveloped by a double membrane
C. Plasmodesmata are the cytoplasmic connections between cells
D. Cell membrane is semipermeable is not correctly permeable

Answer

To solve the question of selecting the false statement, we will analyze each option provided.

### Step-by-Step Solution:

1. **Examine the First Option**:
- The statement is: "Ribosome and centriole are non-membrane bound organelles of the cell."
- Analysis: This statement is true. Ribosomes and centrioles are indeed non-membrane bound organelles, meaning they are not surrounded by a membrane.

2. **Examine the Second Option**:
- The statement is: "Ribosomes are enveloped by a double membrane."
- Analysis: This statement is false. Ribosomes are non-membrane bound organelles and are not surrounded by any membrane, let alone a double membrane.

3. **Examine the Third Option**:
- The statement is: "Plasmodesmata are the cytoplasmic connections between cells."
- Analysis: This statement is true. Plasmodesmata are channels that allow for communication and transport between adjacent plant cells.

4. **Examine the Fourth Option**:
- The statement is: "Cell membrane is semi-permeable."
- Analysis: This statement is true. The cell membrane is indeed semi-permeable, allowing certain molecules to pass while restricting others.

### Conclusion:
The false statement among the options provided is the second option: "Ribosomes are enveloped by a double membrane."

### Final Answer:
**The false statement is: "Ribosomes are enveloped by a double membrane."**

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