The biomolecules synthesis by the rough endoplasmic reticulum are modified here before being released.

Options

A. Golgi complex
B. Vacuoles
C. Lysosomes
D. Peroxisomes

Answer

To answer the question regarding which organelle modifies biomolecules synthesized by the rough endoplasmic reticulum (RER) before they are released, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Role of Rough Endoplasmic Reticulum (RER)**:
- The rough endoplasmic reticulum is primarily involved in the synthesis of proteins. It has ribosomes on its surface, which are responsible for translating mRNA into polypeptide chains.

**Hint**: Remember that the RER is named "rough" due to the presence of ribosomes, which are key to protein synthesis.

2. **Understand the Modification Process**:
- After proteins are synthesized in the RER, they often require modifications such as folding, glycosylation (addition of sugar molecules), and sorting before they can function properly.

**Hint**: Think about where proteins go after they are made in the RER for further processing.

3. **Identify the Organelle Responsible for Modification**:
- The organelle that modifies, sorts, and packages proteins synthesized in the RER is the Golgi complex (or Golgi apparatus). It receives proteins from the RER, modifies them, and then sends them to their final destinations.

**Hint**: The Golgi complex is often referred to as the "post office" of the cell because it packages and ships proteins.

4. **Evaluate the Other Options**:
- **Vacuoles**: These are primarily involved in storage and maintaining osmotic balance, not in protein modification.
- **Lysosomes**: Known as "suicidal bags," they are involved in the digestion of cellular waste and do not modify proteins.
- **Peroxisomes**: These organelles are involved in the breakdown of fatty acids and detoxification processes, not in protein modification.

**Hint**: Consider the primary functions of each organelle listed in the options.

5. **Conclusion**:
- Based on the analysis, the correct answer to the question is the **Golgi complex**, as it is the organelle where the biomolecules synthesized by the rough endoplasmic reticulum are modified before being released.

### Final Answer:
The biomolecules synthesized by the rough endoplasmic reticulum are modified in the **Golgi complex** before being released.

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