Lysosmes are __________ vesicular structures formed by the process of packaging in the _________.

Options

A. a) membrane bound, Golgi apparatus
B. b) non-membrane bound, Golgi apparatus
C. c) membrane bound, ER
D. d) non-membrane bound, ER

Explanation

**Step-by-Step Solution:**

1. **Identify the Structure of Lysosomes:**
- Lysosomes are described as vesicular structures. They are characterized by being membrane-bound organelles within the cell.

2. **Understand the Formation Process:**
- The formation of lysosomes involves the combined activities of two key cellular structures: the endoplasmic reticulum (ER) and the Golgi apparatus.

3. **Role of the Endoplasmic Reticulum:**
- The precursors of hydrolytic enzymes, which are essential components of lysosomes, are synthesized in the rough endoplasmic reticulum (RER).

4. **Transfer to Golgi Apparatus:**
- Once the precursors are formed in the RER, they are transferred to the Golgi apparatus for further processing.

5. **Modification in the Golgi Apparatus:**
- In the Golgi apparatus, these precursors undergo modifications to become active hydrolytic enzymes.

6. **Packaging into Vesicles:**
- The Golgi apparatus then packages these hydrolytic enzymes into larger vesicles through a process of budding or pinching off from its membrane.

7. **Formation of Endosomes:**
- After being released from the Golgi apparatus, these vesicles (now containing hydrolytic enzymes) fuse with endosomes, which are formed by the endocytosis of the plasma membrane.

8. **Maturation into Lysosomes:**
- The endosomes mature and combine with the vesicles from the Golgi apparatus, ultimately resulting in the formation of lysosomes.

9. **Final Answer:**
- Therefore, lysosomes are **membrane-bound** vesicular structures formed by the process of packaging in the **Golgi apparatus**.

**Final Answer:**
Lysosomes are **membrane-bound** vesicular structures formed by the process of packaging in the **Golgi apparatus**.

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