Question

Define the following parts of plant cell.

(Cell wall, cell membrane, cytoplasm, nucleus)

Answer 1

• The important parts of a plant cell are:-

1) Cell wall is a rigid organelle composed of cellulose.

• It lies outside the cell membrane.
• It gives shape to the plant cell and also protects the cell.

2) Plama membrane or cell membrane is a bilipid layer.

• It separates the cell from its external environment.
• It is selectively permeable and also protects the cell and provides stability.
  

3) Cytoplasm is a jelly-like substance composed of water.

• It is found between the cell membrane and nucleus.
• All the organelles are present here.
  
• Eg- Endoplasmic reticulum, golgi apparatus, plastids (speciifc to plant cells), mitochondria, lysosomes etc.

4) Nucleus is the largest organelle in the cell.

• It is surrounded by a double membrane called the nuclear envelope.
• The genetic materials DNA is present here on special strands called chromosomes.
• It is called the control center of the cell (for cell metabolism and reproduction).