which of the following cell organells os known as protein factory?

Options

A. Lysosomes
B. Mitochondria
C. Nucleolus
D. Ribosomes

Answer

### Step-by-Step Solution:

1. **Identify the Question**: The question asks which cell organelle is known as the "protein factory."

2. **Review the Options**: The options provided include lysosomes, mitochondria, nucleolus, and ribosomes.

3. **Analyze Each Option**:
- **Lysosomes**: These are known as "suicidal bags" because they contain digestive enzymes that help in breaking down waste materials in the cell. They are not involved in protein synthesis.
- **Mitochondria**: Known as the "powerhouse of the cell," mitochondria are primarily responsible for ATP production, which is energy for the cell. They do not synthesize proteins.
- **Nucleolus**: This structure is found within the nucleus and is responsible for the production of ribosomes. While it plays a role in protein synthesis, it is not the site where proteins are made.
- **Ribosomes**: These are the organelles responsible for protein synthesis. They assemble amino acids into proteins through a process called translation.

4. **Conclude the Answer**: Since ribosomes are the organelles that synthesize proteins, they are referred to as the "protein factory" of the cell.

### Final Answer:
Ribosomes are known as the protein factory of the cell.

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