Question

Plasma membrane is a semi-permeable membrane
A.True
B.False

Answer 1

Hint: The semipermeable membrane is a layer helps in the passage of the molecule or ions in the cell it plays a major role in the cell function it is a membrane which surrounds the cell and allows the passage of specific molecules that is this permeable membrane is only meant to allow solvent molecules but not solute molecules.

Complete answer:
Plasma membrane is mostly observed in all the living cells this layer is important because it helps in the movement of water molecules or the ions from cell to cell, the plasma membrane is specific when it comes to the movement of the molecules within the cell because it allows the passage of few molecules and restricts the passage of other molecules hence it is called as a semi-permeable membrane because it will not completely allow the passage but it will partially help in the moment of molecules that is it will just allow the passage of solvent molecules
Option a true is correct because it is observed that plasma membrane is indeed a semi-permeable membrane because it helps in the passage of only a few molecules and restricts the other higher molecules
Option be false is not correct because from the above explanation it is seen that the plasma membrane is semi-permeable in all the living cells

Hence option A is correct.

Note:
Plasma membrane play some major role by not just allowing the ions but it will also help in the passage of nutrients and metabolite products and the plasma membrane help the separation of the outer layer or outer part of the cell from the cell inside environment it also helps in the protection of the cell by withstanding the external or internal shocks the plasma membrane is made up to lipids and proteins hence it is referred as phospholipid layer.