Which group of organelles is involved in synthesis of substances needed by cell ?

Options

A. Lysosome, vacuole, golgi body
B. Ribosome, rough ER, smooth ER
C. Rough ER, microtubule, ribosome
D. Smooth ER, lysosome, vacuole

Answer

To answer the question "Which group of organelles is involved in the synthesis of substances needed by the cell?", we will analyze the functions of various organelles mentioned in the question.

### Step-by-Step Solution:

1. **Identify the Organelles**: The organelles to consider include lysosomes, vacuoles, Golgi bodies, ribosomes, rough endoplasmic reticulum (rough ER), and smooth endoplasmic reticulum (smooth ER).

2. **Analyze Each Organelle**:
- **Lysosomes**: These organelles contain hydrolytic enzymes and are primarily involved in digestion and waste processing, not in synthesis.
- **Vacuoles**: They serve as storage compartments for various substances but do not synthesize any materials.
- **Golgi Bodies**: These organelles are involved in the packaging and modification of proteins received from the rough ER but do not directly synthesize substances.
- **Ribosomes**: Ribosomes are the sites of protein synthesis. They translate mRNA into proteins, making them crucial for the synthesis of proteins needed by the cell.
- **Rough Endoplasmic Reticulum (Rough ER)**: This organelle is studded with ribosomes and is directly involved in the synthesis of proteins.
- **Smooth Endoplasmic Reticulum (Smooth ER)**: This organelle is involved in the synthesis of lipids and detoxification processes.

3. **Conclusion**: The organelles primarily involved in the synthesis of substances needed by the cell are:
- **Ribosomes** (for protein synthesis)
- **Rough Endoplasmic Reticulum** (for protein synthesis)
- **Smooth Endoplasmic Reticulum** (for lipid synthesis)

4. **Final Answer**: The group of organelles involved in the synthesis of substances needed by the cell includes ribosomes, rough ER, and smooth ER.