Biology: Cell Structure and Function – Complete Summary Notes
Introduction
Cells are the basic units of life. All living organisms are made up of cells. Cells perform all life
processes such as respiration, growth, and reproduction.
Types of Cells
There are two main types of cells:
• Plant cells
• Animal cells
Structure of a Cell
Cell Membrane: Controls movement of substances into and out of the cell.
Cytoplasm: Jelly-like substance where chemical reactions occur.
Nucleus: Controls cell activities and contains DNA.
Organelles and Their Functions
Mitochondria: Site of respiration and energy release.
Ribosomes: Protein synthesis.
Endoplasmic Reticulum: Transport of materials.
Golgi Apparatus: Modifies and packages proteins.
Plant Cell Only Structures
Cell Wall: Provides support and shape.
Chloroplast: Site of photosynthesis.
Vacuole: Stores cell sap and maintains turgidity.
Differences Between Plant and Animal Cells
Plant cells have a cell wall and chloroplasts, while animal cells do not.
Conclusion
Understanding cell structure and function is essential for biology examinations.
Introduction
Cells are the basic units of life. All living organisms are made up of cells. Cells perform all life
processes such as respiration, growth, and reproduction.
Types of Cells
There are two main types of cells:
• Plant cells
• Animal cells
Structure of a Cell
Cell Membrane: Controls movement of substances into and out of the cell.
Cytoplasm: Jelly-like substance where chemical reactions occur.
Nucleus: Controls cell activities and contains DNA.
Organelles and Their Functions
Mitochondria: Site of respiration and energy release.
Ribosomes: Protein synthesis.
Endoplasmic Reticulum: Transport of materials.
Golgi Apparatus: Modifies and packages proteins.
Plant Cell Only Structures
Cell Wall: Provides support and shape.
Chloroplast: Site of photosynthesis.
Vacuole: Stores cell sap and maintains turgidity.
Differences Between Plant and Animal Cells
Plant cells have a cell wall and chloroplasts, while animal cells do not.
Conclusion
Understanding cell structure and function is essential for biology examinations.
