Question

Which of these is not related to the endoplasmic reticulum?

• A. It behaves as a transport channel for proteins between nucleus and cytoplasm
• B. It transports materials between various regions in the cytoplasm
• C. It can be the site of energy generation
• D. It can be the site for some biochemical activities of the cell

Answer 1

The correct option is C

It can be the site of energy generation

The correct option is : C

Explanation of the correct option:

1. The endoplasmic reticulum is a link of membranous tubules, which is situated within the cytoplasm of a living cell.
2. It is associated with ribosomes and is mainly involved in the generation of proteins and lipids.
3. The endoplasmic reticulum is not a site of energy production, it is done in the mitochondria.
4. Mitochondria are membrane-bound organelles, which produce the majority of the chemical energy required to power the biochemical reactions within the cell.
5. Within the mitochondria, the chemical energy produced is stored within a small molecule known as ATP or adenine triphosphate.

Explanation of incorrect options:

Option A:

1. One of the major functions of the endoplasmic reticulum is to transport the proteins, generally the glycoproteins in vesicles between the nucleus and cytoplasm.
2. The rough endoplasmic reticulum, which is formed by the attached ribosomes helps in the transportation of proteins.

Option B:

1. The endoplasmic reticulum transports proteins, along with other substances like lipids between the various regions in the cytoplasm.
2. The proteins and lipids are transported to Golgi bodies for further processing.

Option D:

1. The endoplasmic reticulum is a dynamic and large composition, which performs several essential functions in cell-like protein synthesis, calcium storage, and lipid metabolism.
2. Therefore, it can be said that the endoplasmic reticulum is the site for some of the biochemical activities of the cell.

Final answer: Endoplasmic reticulum is not a site of energy generation.