Read the statement carefully and choose the correct option.
A. Primary cell wall of plant cells is incapable of growth and diminishes gradually as the cell matures.
B. RER is abundantly found in the cells which are actively involved in proteins synthesis and secretion.
C. SER is a major site for lipid synthesis.
D. A number of proteins synthesized by RER are modified inside the Golgi apparatus.

Options

A. A , B & C
B. A , C & D
C. B , C & D
D. A , B & D

Answer

To solve the question, we need to evaluate each of the four statements provided and determine which ones are correct. Here’s a step-by-step breakdown:

### Step 1: Evaluate Statement A
**Statement A:** "Primary cell wall of plant cells is incapable of growth and diminishes gradually as the cell matures."

- The primary cell wall in young plant cells is flexible and capable of growth as the cell increases in size.
- As the cell matures, it may develop a secondary cell wall, but the primary cell wall does not diminish; rather, it may become more rigid.
- **Conclusion:** This statement is **incorrect**.

### Step 2: Evaluate Statement B
**Statement B:** "RER is abundantly found in the cells which are actively involved in protein synthesis and secretion."

- The Rough Endoplasmic Reticulum (RER) is studded with ribosomes, which are the sites of protein synthesis.
- Cells that are actively synthesizing and secreting proteins (like pancreatic cells) have abundant RER.
- **Conclusion:** This statement is **correct**.

### Step 3: Evaluate Statement C
**Statement C:** "SER is a major site for lipid synthesis."

- The Smooth Endoplasmic Reticulum (SER) is involved in the synthesis of lipids and does not have ribosomes on its surface.
- It plays a crucial role in lipid metabolism.
- **Conclusion:** This statement is **correct**.

### Step 4: Evaluate Statement D
**Statement D:** "A number of proteins synthesized by RER are modified inside the Golgi apparatus."

- The Golgi apparatus is responsible for modifying, packaging, and distributing proteins synthesized in the RER.
- It processes these proteins before they are sent to their final destinations.
- **Conclusion:** This statement is **correct**.

### Final Evaluation
- **Statement A:** Incorrect
- **Statement B:** Correct
- **Statement C:** Correct
- **Statement D:** Correct

Thus, the correct options are B, C, and D.

### Final Answer
The correct statements are **B, C, and D**.

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