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 statement regarding plant cell structures and organelles to determine which ones are correct.

### Step-by-Step Solution:

1. **Evaluate Statement A:**
- **Statement:** "Primary cell wall of plant cells is incapable of growth and diminishes gradually as the cell matures."
- **Analysis:** The primary cell wall is indeed flexible and can grow as the cell expands. However, it does not diminish; instead, it may be replaced or reinforced by a secondary cell wall in mature cells. Therefore, this statement is **incorrect**.

2. **Evaluate Statement B:**
- **Statement:** "RER is abundantly found in the cells which are actively involved in protein synthesis and secretion."
- **Analysis:** The rough endoplasmic reticulum (RER) is indeed associated with ribosomes and is primarily involved in the synthesis of proteins, especially in cells that secrete proteins. This statement is **correct**.

3. **Evaluate Statement C:**
- **Statement:** "SER is a major site for lipid synthesis."
- **Analysis:** The smooth endoplasmic reticulum (SER) is indeed involved in lipid synthesis. However, the phrase "major site" can be misleading as it depends on the context of the cell type. In general, SER is recognized for lipid synthesis, making this statement **correct**.

4. **Evaluate Statement D:**
- **Statement:** "A number of proteins synthesized by RER are modified inside the Golgi apparatus."
- **Analysis:** This statement is accurate as proteins synthesized in the RER are typically transported to the Golgi apparatus for further modification and sorting. Therefore, this statement is **correct**.

### Conclusion:
The correct statements are B, C, and D.

### Final Answer:
The correct options are B, C, and D.

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