1. CELL BIOLOGY CELL - basic unit of life CELL THEORY
- all organisms are composed of cells
- cells are the basic unit of structure
and function in organisms
- all cells come from pre-existing cells
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2. CELL SHAPE - related to function
CELL SIZE
- smallest cell (0.1 μm)
- mycoplasmas (Kingdom Monera)
- largest cell (4 in)
- ostrich egg cell
CELL SHAPE - related to function
- skin cell - flattened, irregular
- covers and protects
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- nerve cell - long, thin
- transmission lines

3. TYPES OF CELLS PROKARYOTES (pro = before; karyote = nucleus)
Simple cells without a true nucleus
No nuclear membrane, no membrane- bound organelles
DNA is a singular circular chromosome
Kingdom Monera
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Refer to textbook page 72.
Bacterium
(colored SEM; magnification 8800x)
Cell membrane
Cytoplasm

4. EUKARYOTES (eu = true; karyote = nucleus)
Cells with a nucleus
Have a nuclear membrane and membrane-bound organelles
Have chromosomes made of DNA and protein
Kingdom Protista, Fungi, Plantae, Animalia
Nucleus
Entire slide appears . Do not need to copy diagram.
Refer to textbook page 72.
Cytoplasm
Organelles
Cell membrane