Biology 102 Chapter 4 - Cells: Intro and Membranes
Cells
Cell Theory
1. All living things are composed of one or more cells.
2. All cells come from pre-existing cells.
All cells have:
1. A plasma membrane: an outer layer that 2. Cytoplasm: the liquid (cytosol) contained
separates the contents of the cell from the by the membrane and everything suspended in
outer environment. it.
3. DNA: Hereditary material of all life 4. Ribosomes: protein makers
Red blood cells Plant cells
1
Cells
Cell Theory
1. All living things are composed of one or more cells.
2. All cells come from pre-existing cells.
All cells have:
1. A plasma membrane: an outer layer that 2. Cytoplasm: the liquid (cytosol) contained
separates the contents of the cell from the by the membrane and everything suspended in
outer environment. it.
3. DNA: Hereditary material of all life 4. Ribosomes: protein makers
Red blood cells Plant cells
1
