Question

What is an example of selectively permeable membrane?
a. Plasmalemma
b. Cell wall
c. Mitochondrial membrane
d. Chloroplast membrane

Answer 1

Hint: The permeable membrane is the selective membrane for the molecules present on either side in our body. So, it is called a selectively permeable membrane. The cell membrane is synonymous to the plasmalemma. The cell wall, mitochondrial membrane, as well as chloroplast membrane are semi-permeable.

Complete answer:
> Option – A- The cell membrane also known as the plasma membrane (PM) historically known as plasmalemma. It is a biological membrane that separates and protects the interior of all cells from the outside environment or in biological said extracellular space. It acts as protection to the cell from its outer environment. The plasmalemma consists of a lipid bilayer, cholesterols that sit between phospholipids to maintain their fluidity at various temperatures.

> Option – B- A cell wall is a structural layer surrounding all types of cells. It is present outside the cell membrane. The cell wall can be tough, flexible, as well as sometimes rigid. It provides the cell with both structural supports along with protection.

> Option-C-Mitochondria contain two major membranes. That are-
The outer mitochondrial membrane, and
The inner mitochondrial membrane
The outer fully surrounds the inner membrane, with a small intermembrane space in between them.

> Option- D - Chloroplasts membrane includes several important membranes, vital for their functioning. Like mitochondria, chloroplasts have a double-membrane enveloped, known the chloroplast envelope, but unlike mitochondria, chloroplasts membrane also have internal membrane structures known as thylakoids

Hence, The correct answer is option (A).

Note: The most suitable example of selective membrane is plasmalemma as this cell membrane is considered to be a synonym to permeable membrane. The plasmalemma works as a separator of the interior of a cell from the outer environment.