Question

Which of the following is called as the brain of the cell?
A. Nucleus
B. Mitochondria
C. Ribosomes
D. Plasma membrane

Answer 1

Hint: As the control and coordination of a human body is controlled by the brain, the main functions of cells like information storage, retrieval and duplication of genetic information is done by the nucleus.

Complete answer:
The brain is the most important organ in the human body as it controls and coordinates actions and reactions, allows us to think and feel and anything that makes us human.

> So, our first option is nucleus. As we know nucleus is present in the center of the cell having DNA and RNA in it.
The functions of the nucleus are:
- It supports and protects the cell.
- It controls the cell like what enters and leaves the cell.
- All the metabolic reactions occur inside the nucleus.
- Nucleolus is also present inside the cell which is the site of transcription, it synthesizes and assembles ribosomes and it also synthesizes RNA. So, we can call it the brain of the nucleus.

> Next option is mitochondria. As we know mitochondria is known as the powerhouse of the cell.

> Option C is ribosomes. The only main function of ribosomes is protein synthesis.

> Option D is plasma membrane. The cell membrane is found in all cells that separates the interior of the cell from the outside environment.

So, we can say that the nucleus controls the cell and acts as the brain of the cell.
Hence, The correct answer is option (A).

Note: The Nucleus is the control center of eukaryotic cells which is responsible for the coordination of genes and gene expression. The nucleus consists of nuclear membrane, chromosomes, nucleoplasm, and nucleolus.