Choose the correct statements with respect to cell wall
A. Precursor of cell plate is middle lamellum
B. Primary cell wall is outer most layer of cell wall
C. Materials of primary cell wall holds the cells together
D. Middle lamellum is mainly composed of calcium pectate
E. Cell wall and middle lamellae may be traversed by plasmodesmata
F. Secondary wall is formed outside the primary wall in all the cases

Options

A. A,B,C,D
B. D,E
C. B,C,D
D. E alone

Answer

To solve the question regarding the correct statements about the cell wall, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Statement A: Precursor of cell plate is middle lamellum.**
- This statement is **incorrect**. The precursor of the cell plate is actually the Golgi vesicles, not the middle lamellum.

2. **Statement B: Primary cell wall is outermost layer of cell wall.**
- This statement is **correct**. The primary cell wall is indeed the outermost layer of the cell wall in plant cells.

3. **Statement C: Materials of primary cell wall holds the cells together.**
- This statement is **incorrect**. While the materials of the primary cell wall contribute to the structure, it is primarily the middle lamella that acts as the cementing layer holding the cells together.

4. **Statement D: Middle lamellum is mainly composed of calcium pectate.**
- This statement is **correct**. The middle lamella is primarily composed of calcium pectate, which serves as a cementing substance between plant cells.

5. **Statement E: Cell wall and middle lamellae may be traversed by plasmodesmata.**
- This statement is **correct**. Plasmodesmata are microscopic channels that traverse the cell wall and middle lamella, allowing for communication and transport between adjacent cells.

6. **Statement F: Secondary wall is formed outside the primary wall in all the cases.**
- This statement is **incorrect**. The secondary wall is typically formed inside the primary wall, not outside.

### Summary of Correct Statements:
- The correct statements are **B, D, and E**.

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

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