Question

The first wall layer of the cell is
A. Tertiary wall if present
B. Secondary wall
C. Primary wall
D. Middle lamella if present

Answer 1

The cell wall is a complicated, strongly constructed structure that determines the form of a plant cell. The cell wall is a tough and resilient metallic framework that covers the cell membrane in plants, algae and most prokaryotes. It is also present in bacteria and fungi.

Complete Answer:
- Apart from defining the shape of the plant cells, the cell wall has a number of other functions too.
- Middle lamella, Primary cell wall and Secondary cell wall are the three layers of the cell wall. The cell wall can consist of two or three layers depending on the type of cell plant. These layers vary in the macromolecular structure, thickness, and work of various species.
- While the cell wall acts as a single structure all over the cell, it is worth noting that the structure is positioned in a series of layers around the cell. Here the layers are placed around the cell as the cell divides.
- Located between the double cell wall of the neighbouring cells, the middle lamella is the first layer of the wall to develop. As it is the outer layer out of the three layers of the cell wall, the middle lamella serves as the portion that connects the neighbouring cells. Many of the other contents of the middle lamella are Calcium ions and Magnesium ions.

So, the correct answer is Option D- Middle lamella if present.

Note: Since the middle lamella is formed by the plant cells while they begin to separate, it serves as a block of cement that keeps the adjacent cells together while also forming a border between the cells. When the petals and leaves break, the middle lamella dissolves, causing the cells to divide.