Organelle involved in modification and routing of newly synthesised proteins to their destination is

Options

A. Mitochondria
B. Endoplasmic reticulum
C. Lysosomes
D. Chloroplast

Answer

To solve the question regarding the organelle involved in the modification and routing of newly synthesized proteins to their destination, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for the specific organelle responsible for the modification and routing of newly synthesized proteins.

2. **Evaluate the Options**:
- **Mitochondria**: Known as the powerhouse of the cell, mitochondria are primarily involved in energy production through ATP synthesis and cellular respiration. They do not play a role in protein modification or routing.

- **Endoplasmic Reticulum (ER)**: The ER is a membrane-bound organelle that is crucial for the synthesis, folding, modification, and transport of proteins. It consists of two types: rough ER (which has ribosomes and is involved in protein synthesis) and smooth ER (which is involved in lipid synthesis). The rough ER is particularly important for the modification and routing of proteins to their final destinations.

- **Lysosome**: This organelle is known as the "suicidal bag" of the cell, containing digestive enzymes that break down waste materials and cellular debris. It is not involved in the modification or routing of proteins.

- **Chloroplast**: Found only in plant cells, chloroplasts are responsible for photosynthesis and do not participate in protein modification or routing.

3. **Identify the Correct Answer**: Based on the evaluation, the endoplasmic reticulum is the organelle that is involved in the modification and routing of newly synthesized proteins. Therefore, the correct answer is **Endoplasmic Reticulum**.

### Final Answer:
The organelle involved in the modification and routing of newly synthesized proteins to their destination is the **Endoplasmic Reticulum**.

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