Question

Define cell. describe structure of cell with the help of suitable diagram.​

Answer 1

Cell :

Cell is the structural and functional unit of life. Cell performs the various functions in the body and all the cells have specific functions. Cell plays an important role to build a body so it is called the structural unit of life and it performs the various functions so it is called functional unit of life.

Structure of cell :

Cell is made up of various components. The components of cell are nucleus, mitochondria, Golgi apparatus, Endoplasmic reticulum, ribosome, lysosome, cytoplasm, plasma membrane, cell membrane.

Answer 2

❏ Cell...✒

Cell is a compartment where all the activities of life takes place. There are two basic types of cells in nature, viz., prokaryotic cells and eukaryotic cells.

❏ Prokaryotic Cell...✒

• Prokaryotes are the simplest cells without a nucleus and cell organelles.

• Prokaryotic cells are the smallest cells (1-10 μm).

• Unicellular and earliest to evolve (~4 billion years ago), still available.

• The cell wall is rigid

• These cells reproduce asexually.

❏ Eukaryotic Cell...✒

• Eukaryotes are sophisticated cells with a well defined nucleus and cell organelles.

• The cells are comparatively larger in size (10-100 μm).

• Unicellular to multicellular in nature and evolved ~1 billion years ago.

• The cell membrane is semipermeable and flexible.

• These cells reproduce Both asexually and sexually.