Question

The endoskeleton of the cell is made up of

• A. Cell wall
• B. Endoplasmic reticulum
• C. Cytoplasm
• D. Mitochondria

Answer 1

The correct option is B

Endoplasmic reticulum

The correct option is B:

Explanation for the correct option:

1. The endoskeleton refers to the internal membrane system of the cell, which supports the cells just like a skeletal system supports the body of an organism.
2. This endomembrane system comprises the endoplasmic reticulum, Golgi apparatus, plasma membrane, and lysosome.
3. The cytoskeleton of the cell, also known as the endoskeleton of the cell, is formed by the endoplasmic reticulum.
4. It functions as a cytoplasmic framework, giving the cell's vital biological and metabolic processes a place to take place.

Explanation for the incorrect options:

Option A:

1. The cell wall is the rigid and non-living permeable wall that only surrounds the plasma membrane and supports the cell of the plant.
2. The cell wall actually forms the external boundary of the cell.
3. Whereas the endoskeleton is the internal membrane system.

Option C:

1. The cytoplasm is the thick solution that is present in each cell.
2. It is actually enclosed by the cell membrane.
3. It is just the fluid content of the cell in which the organelles float.
4. So, it can not be used to make up the endoskeleton of cells.

Option D:

1. Mitochondria are the membrane-bound cell organelles and generate most of the chemical energy.
2. It produces energy from the food and for the cell.
3. It is not there for the making up of the endoskeleton of the cell.

Final answer: The endoskeleton of the cell is made up of endoplasmic reticulum.