The endomembrane cell organelle with distinct cis and trans faces is

Options

A. Endoplasmic reticulum
B. vacuole
C. golgi complex
D. lysosome

Answer

To answer the question, "The endomembrane cell organelle with distinct cis and trans faces is," we need to analyze the options provided: endoplasmic reticulum, vacuole, Golgi complex, and lysosome.

### Step-by-Step Solution:

1. **Understanding the Options**:
- **Endoplasmic Reticulum (ER)**: This organelle is composed of a network of membranes and is involved in the synthesis of proteins and lipids. However, it does not have distinct cis and trans faces.
- **Vacuole**: This is a membrane-bound space within the cell, primarily for storage. It does not have distinct cis and trans faces.
- **Golgi Complex**: This organelle is made up of flattened membrane-bound sacs called cisternae. It is known for its role in modifying, sorting, and packaging proteins and lipids for secretion or delivery to other organelles. The Golgi complex has two distinct faces: the cis face (receiving side) and the trans face (shipping side).
- **Lysosome**: These are vesicular structures containing hydrolytic enzymes for digestion. They do not have distinct cis and trans faces.

2. **Identifying the Correct Answer**:
- Among the options, the Golgi complex is the only organelle that has distinct cis and trans faces. The cis face is where substances enter the Golgi, and the trans face is where they exit.

3. **Conclusion**:
- Therefore, the correct answer to the question is the **Golgi complex**.

### Final Answer:
The endomembrane cell organelle with distinct cis and trans faces is the **Golgi complex**.

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