PROKARYOTIC CELL PROKARYOTIC CELL © Brooks/Cole Publ.Co. Miller 2000	EUKARYOTIC CELL EUKARYOTIC CELL © Brooks/Cole Publ.Co. Miller 2000
Cell Membrane No Nucleus No Organelles Ribosomes for Synthesis	Cell Membrane (Science!) Nucleus contains DNA Organelles (Mitochondria) Ribosomes for Synthesis

Cell Membrane	The layer that separates the cell contents from the surrounding environment and controls the transport of substances into and out of the cell.
Nucleus	The cell organelle that contains the genetic material and separates it from the cytoplasm.
Mitochondria	The cell organelle where energy is produced in eucaryotic cells. There, ATP is produced by the 2nd & 3rd stages of aerobic respiration.
Ribosomes	The cellular particle where amino acids are joined to produce the primary structure of proteins, based on the mRNA sequence. Composed of 2 rRNA units and proteins.
Chloroplasts	The cell organelle where photosynthesis takes place in eucaryotic cells.

Domain Bacteria	Domain Archaea	Domain Eukarya
1-10 µm	1-10 µm	10-100 µm
Cell wall of peptidoglycan	Cell wall various	Cell wall of cellulose or chitin
No introns in chromosomes	Some introns present	Introns present
Membranes based on fatty acids	Membranes based on isoprenes	Membranes based on fatty acids
No membrane-bounded orgelles	No membrane-bounded orgelles	Membrane-bounded orgelles
4-subunit RNA polymerase	Many-subunit RNA polymerase	Many-subunit RNA polymerase
Introns: DNA "punctuation" between protein-codeing sequences RNA polymerase: Enzyme that transcribes RNA from DNA www.madsci.org/posts/archives/jan2000/946839789.Cb.r.html