2005-2006

surrounded by a cell membrane

have cytosol

▪ semi-fluid substance within the membrane

contain chromosomes which have genes in the form of DNA

have ribosomes

▪ tiny “organelles” that make proteins using instructions contained in genes

2005-2006

Prokaryote Eukaryote

2005-2006

Has organellesMore complex

Nuclear membrane

Ribosomes

No organellesLess complex

Cell Membrane

Nucleus

Word origin-> “Pro” ( first ) “ Karyon” ( nut, kernel)-> first cell

Example: bacteria simple, less complex, came first DNA found in the nucleoid region, does not

have a nuclear membrane. Has ribosomes Has a cell wall No organelles

2005-2006

Word Origin-> “ Eu” ( true), “karyon” ( nut, kernel)-> true cell

Examples: plants, animals Bigger than prokaryotes More complex, came later DNA enclosed in a nuclear membrane Has organelles Has ribosomes Plant cells have a cell wall, animal cells don’t.

2005-2006