On which side of Golgi apparatus are the merbranes thin

Options

A. Concave distal side
B. Concave proximal side
C. Convex distal side
D. Convex proximal side

Answer

To answer the question, "On which side of the Golgi apparatus are the membranes thin?", we can follow these steps:

### Step 1: Understand the Structure of the Golgi Apparatus
The Golgi apparatus is an organelle found in eukaryotic cells, composed of a series of flattened membrane-bound sacs known as cisternae. It plays a crucial role in the modification, sorting, and packaging of proteins and lipids.

**Hint:** Remember that the Golgi apparatus has two distinct faces: the cis face and the trans face.

### Step 2: Identify the Two Faces of the Golgi Apparatus
The Golgi apparatus has two main sides:
- **Cis Face (Convex)**: This side faces the endoplasmic reticulum (ER) and is responsible for receiving vesicles containing proteins and lipids from the ER.
- **Trans Face (Concave)**: This side faces away from the ER and is involved in the packaging and distribution of the modified proteins and lipids.

**Hint:** The cis face is the receiving side, while the trans face is the shipping side.

### Step 3: Determine the Thickness of Membranes
According to the information provided, the membranes on the cis face (convex side) are thinner because this side is involved in receiving vesicles from the ER. In contrast, the trans face (concave side) is where the processed materials are packaged and released, which may involve thicker membranes.

**Hint:** Think about the function of each face and how that relates to the structure of the membranes.

### Step 4: Answer the Question
Based on the understanding that the membranes are thinner on the side that receives vesicles, we conclude that the membranes are thin on the **Convex Proximal Side** (Cis Face) of the Golgi apparatus.

**Final Answer:** The membranes are thin on the **Convex Proximal Side** (Option D).