Which of the following provides mechanical support and shape to the cell :-

Options

A. Golgi comples
B. Centrioles
C. Lomasomes
D. E.R.

Answer

To determine which structure provides mechanical support and shape to the cell, we can analyze the options provided. Here’s a step-by-step solution:

### Step 1: Understand the Question
The question asks for the structure that provides mechanical support and shape to the cell.

### Step 2: Identify Possible Options
The options typically include structures like the cytoskeleton, Golgi apparatus, endoplasmic reticulum, and lysosomes.

### Step 3: Analyze the Cytoskeleton
The cytoskeleton is a network of fibers that provides structural support and shape to the cell. It consists of microtubules and microfilaments, which are crucial for maintaining the cell's shape and enabling movement.

### Step 4: Consider the Endoplasmic Reticulum
The endoplasmic reticulum (ER) is an extensive network of membranes within the cell. It plays a role in the synthesis of proteins and lipids. The rough ER is studded with ribosomes and is involved in protein synthesis, while the smooth ER is involved in lipid synthesis. The ER also contributes to the overall shape and mechanical support of the cell.

### Step 5: Evaluate Other Options
- **Golgi Apparatus**: Primarily involved in modifying, sorting, and packaging proteins and lipids, not in providing mechanical support.
- **Lysosomes**: Contain digestive enzymes and are involved in waste processing, not in providing structural support.

### Step 6: Conclusion
Based on the analysis, the structures that provide mechanical support and shape to the cell are the cytoskeleton and the endoplasmic reticulum. However, since the question specifically asks for one option, the endoplasmic reticulum is the correct answer in this context.

### Final Answer
The structure that provides mechanical support and shape to the cell is the **endoplasmic reticulum** (option number 4).

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