Cell Wall | Definition, Function, Discovered, Formation

Hello friends, today we will read A to Z about cell wall like: what is the cell wall, in which it is found, who discovered it, what it is made of, etc. So without wasting any time, let’s start.

What is a cell wall?

After the plasma membrane, the cell is surrounded from the outside by another layer called the cell wall. It is a hard non-living cover.

What is the function of the cell wall?

The cell wall provides protection to the cell. And helps in maintaining the shape of the cell. It prevents the cell from bursting.

Who discovered the cell wall?

The cell wall was first discovered by Robert Hooke in 1665.

Where is the cell wall found?

The cell wall is found in plants, fungi, algae, and bacteria but not found in animals.

What is the cell wall of plants made of?

The plant cell wall is made up of cellulose, hemicellulose, and pectin.

What is the cell wall of fungi made of?

In fungi, the cell wall is made of chitin.

What is the cell wall of algae made of?

The cell wall of algae is composed of cellulose, galactans, mannans, and minerals.

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What is the cell wall of bacteria made of?

The cell wall in bacteria is made up of peptidoglycan, and murein.

How is the cell wall formed during cell division?

Or how is the cell wall formed?

In cell division, the nucleus first divides into two parts. The division of the nucleus is called karyokinesis. Then the cytoplasm divides, which is called cytokinesis.

In plant cells also, the cytoplasm is divided after the division of the nucleus, but the division of the cytoplasm is by a method called the cell plate method. In this method, the Endoplasmic reticulum (ER) and Golgi body present in the cell come together in between.

And moving from the center to the periphery, they make a plate. And because of this plate, the cytoplasm is divided into two parts. This plate is made up of two organelles, the Endoplasmic reticulum (ER) and the Golgi body.

And those Golgi bodies found in plant cells are called dictyosomes. Now both these organelles secrete a chemical which is calcium and magnesium pectate. Now both these organelles leave this chemical in the middle and half goes into this cytoplasm and half into that cytoplasm. And these chemicals form a banded structure called the middle lamella.

cell wall, plant cell
Cell wall image credit — GeeksforGeeks.org

ER, and Golgi’s bodies are present in both cells. Now both of them again secrete a chemical on both sides of the membrane which is cellulose, hemicellulose, and pectin. When secreted, a layer is formed on both sides which is called a primary wall.

Now it will do its work but when this primary wall gradually becomes old or aged then it will move inside the cell and in its place, another new primary wall will be formed. It is said This process keeps on happening again and again. This primary wall and secondary wall together are called the cell wall.

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As you know that in between the cell walls of both cells, the membrane is located, in these two cytoplasmic fibers (plasmodesmata) are located in a cross wise manner, which connects the surrounding cytoplasm.

Some Important Questions Answer –

Do animal cells have a cell wall?


Do prokaryotes have a cell wall?


Do eukaryotes have a cell wall?

Yes, Plants, Fungi, and Algae

Does fungi have a cell wall?


Do all cells have a cell wall?

No, the cell wall is absent in animal cells

Do bacteria have a cell wall?


How does the cell wall protect a plant cell?

Hint: Read the article.

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