Consider the following organelles present in a cell.
1. Mitochondria 2. Endoplasmic reticulum 3. Golgi body 4. Lysosomes 5. Ribosomes 6. Plastids
Out of these, the organelles involved in protein synthesis processing are

Options

A. 1 and 6
B. 2, 3 and 5
C. 4, 5 and 6
D. 2 and 4

Explanation

To solve the question regarding which organelles are involved in protein synthesis and processing, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Organelles**: We have six organelles listed:
- Mitochondria
- Endoplasmic reticulum
- Golgi body
- Lysosomes
- Ribosomes
- Plastids

2. **Understand Protein Synthesis**: Protein synthesis is the process of creating proteins from amino acids, which involves transcription (in the nucleus) and translation (in the cytoplasm).

3. **Determine the Role of Each Organelle**:
- **Ribosomes**: These are the primary sites of protein synthesis. They translate messenger RNA (mRNA) into polypeptide chains (proteins).
- **Endoplasmic Reticulum (ER)**: The rough ER is studded with ribosomes and plays a crucial role in the synthesis and processing of proteins. It helps in folding and modifying proteins.
- **Golgi Body**: This organelle is involved in the processing, packaging, and distribution of proteins synthesized in the ER. It modifies proteins and prepares them for secretion or use within the cell.
- **Mitochondria, Lysosomes, and Plastids**: These organelles are not directly involved in protein synthesis. Mitochondria are involved in energy production, lysosomes in digestion and waste processing, and plastids in photosynthesis (in plants).

4. **List the Involved Organelles**: Based on the roles identified:
- Ribosomes (5)
- Endoplasmic Reticulum (2)
- Golgi Body (3)

5. **Final Answer**: The organelles involved in protein synthesis and processing are:
- Endoplasmic Reticulum (2)
- Golgi Body (3)
- Ribosomes (5)

Thus, the answer is option B: 2, 3, and 5.