Which one is outermost layer in plant cell . (1) middle lamellae (2) primary cell wall (3) tertiary cell wall (4) secondary cell wall?

Question

Answer

Outermost layer of the cell member is primary cell wall. outermost layer of plant cell is middle lamella.

Answer

Cell wall composed of three layers..they are MIDDLE LAMELLA,PRIMARY CELL WALL, SECONDARY CELL WALL...primary cell wall is outer most layer... so option 2 is correct..

Answer

**The Outermost Layer in a Plant Cell**

The outermost layer in a plant cell is the middle lamellae. It is a thin layer located between adjacent plant cells, holding them together and providing structural support. The middle lamellae is composed mainly of pectins, a type of complex carbohydrate.

**Explanation of the Different Cell Wall Layers**

To understand why the middle lamellae is the outermost layer, it is essential to explain the different cell wall layers present in a plant cell.

1. **Primary Cell Wall:** The primary cell wall is the first layer that develops around a young plant cell. It is flexible and allows the cell to expand during growth. The primary cell wall primarily consists of cellulose, hemicellulose, and pectins.

2. **Secondary Cell Wall:** In some plant cells, a secondary cell wall forms inside the primary cell wall after the cell has stopped growing. The secondary cell wall provides additional strength and rigidity to the cell. It is composed of cellulose, lignin, and other polymers.

3. **Tertiary Cell Wall:** The tertiary cell wall is a specialized layer found in certain plant cells, particularly those involved in water transport, such as xylem vessels. It provides further reinforcement and durability to withstand high pressures.

**The Position of Middle Lamellae**

The middle lamellae is located between adjacent plant cells and acts as a cementing layer. It is responsible for holding neighboring cells together and forming tissues. The middle lamellae plays a crucial role in the structural integrity of plant tissues by providing adhesion between cells.

**Functions of Middle Lamellae**

1. **Cell-to-Cell Adhesion:** The middle lamellae contains a high concentration of pectins, which have a strong affinity for water molecules. This property allows the middle lamellae to form a gel-like substance that acts as a glue, holding adjacent cells together.

2. **Communication and Transport:** The middle lamellae also plays a role in intercellular communication and transport. It contains channels called plasmodesmata, which allow for the exchange of molecules, nutrients, and signals between adjacent cells.

3. **Barrier Function:** The middle lamellae acts as a barrier, preventing the movement of large molecules and pathogens between cells. This barrier function helps protect the plant from external threats and maintains the integrity of individual cells.

In conclusion, the outermost layer in a plant cell is the middle lamellae. It serves as a cementing layer between adjacent cells, providing adhesion, communication, and structural support to plant tissues. The primary cell wall, secondary cell wall, and tertiary cell wall are located inside the middle lamellae and fulfill different functions in plant cell structure and function.

Answer

2)primary cell wall...See my dp...u will understand more better... hope u get it...😄😄😄

Answer

The primary cell wall is the outermost layer of cell wall

Answer

Middle lamella

Answer

Obviously it is primary cell wall.... Option 2

Answer

PRIMARY CELL WALL

Answer

I think primary cell wall

Answer

Primary cell wall because middle lamellae differentiate two neiboughring cell

Answer

Parallelogram HEAR
HE = 5 cm
EA = 6 cm

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