Golgi apparatus is concerned with

Options

A. Excretion
B. Secretion
C. ATP synthesis
D. RNA synthesis

Answer

**Step-by-Step Solution:**

1. **Identify the Golgi Apparatus**: The Golgi apparatus, also known as the Golgi complex or Golgi body, is a membrane-bound organelle found in eukaryotic cells. It was discovered by the scientist Camillo Golgi.

2. **Structure of the Golgi Apparatus**: It consists of a series of flattened, stacked pouches called cisternae. These structures are involved in processing and packaging macromolecules.

3. **Functions of the Golgi Apparatus**: The Golgi apparatus plays a crucial role in the modification, sorting, and packaging of proteins and lipids that have been synthesized in the endoplasmic reticulum (ER).

4. **Secretion Role**: One of the primary functions of the Golgi apparatus is secretion. It modifies proteins and lipids and then packages them into vesicles for transport to their destination, which can be either inside or outside the cell.

5. **Eliminate Incorrect Options**:
- Option A (excretion) is not the main function of the Golgi apparatus.
- Option C (ATP synthesis) is primarily the function of mitochondria.
- Option D (RNA synthesis) occurs in the nucleus, not in the Golgi apparatus.

6. **Conclusion**: Based on the functions of the Golgi apparatus and the elimination of incorrect options, the correct answer is **B: secretion**.