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The plasma membrane is a fully permeable...

The plasma membrane is a fully permeable membrane.

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**Step-by-Step Solution:** 1. **Understanding the Statement**: The question states that "The plasma membrane is a fully permeable membrane." We need to evaluate the accuracy of this statement. 2. **Definition of Fully Permeable Membrane**: A fully permeable membrane is one that allows all types of molecules to pass through it freely, without any restrictions. An example of a fully permeable membrane is the cell wall, which permits the passage of all substances. 3. **Characteristics of Plasma Membrane**: The plasma membrane, on the other hand, does not allow all substances to pass through. It is designed to control the movement of molecules in and out of the cell. 4. **Selective Permeability**: The plasma membrane is described as selectively permeable (or semi-permeable). This means it permits the passage of certain molecules while restricting others. This selectivity is crucial for maintaining the cell's internal environment. 5. **Conclusion**: Since the plasma membrane does not allow all types of molecules to pass freely, the statement that "The plasma membrane is a fully permeable membrane" is false. Instead, it should be referred to as a selectively permeable membrane. **Final Answer**: The statement is false. The plasma membrane is not a fully permeable membrane; it is selectively permeable. ---
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Knowledge Check

  • Plasma membrane helps in

    A
    osmoregulation
    B
    protein synthesis
    C
    nucleic acid synthesis
    D
    transportation of only water in and out of cell
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