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Section 1 – Microscope Section 2 – Prokaryotic and Eukaryotic cells,
cell membrane Section 3 – Cell organelles
Cells
Lack a nucleus◦ pro – means “before”◦ karyon – means “nut or kernal”
pertains to the nucleus Lack organelles
Prokaryotes
Don’t focus just on the negatives! We have:
◦ Cell membrane Separates the inside from the outside of the
cell Controls what comes in/goes out of the cell
◦Cell wall Gives the cell support Outer most layer
Prokaryotes
Have flagella◦ Long “whip” like structure that allow for
movement◦ Used for mobility
Prokaryotes
http://www.youtube.com/watch?v=QGAm6hMysTA
DNA◦ In a loop structure◦ Free floating around the cell
Ribosomes◦ Used to make proteins
Prokaryotes
ProkaryotesBacteria
EukaryotesPlant and Animal
-Lack a nucleus-Lack organelles-Generally small-Less complex-Have cell wall-Have cell membrane-Have flagella-DNA in a loop-Have ribosomes
Eukaryotes Have a nucleus
◦ eu – means “true”◦ karyon – means “nut or kernal”
pertains to the nucleus
Have lots of organelles!◦ All have a specific job
We have:◦ Cell membrane
Separates the inside from the outside of the cell
◦Instead of a cell wall, they have a cytoskeleton Gives the cell support
Eukaryotes
Can also have flagellum◦ Example: Sperm
Have a nucleus Have DNA
◦ DNA is inside the nucleus◦ In a structure called a chromosome
Eukaryotes
-Have DNA-Have ribosomes-Cell wall (eukaryotic plant cells)-Cell Membrane-(some) flagella
animal
ProkaryotesBacteria
EukaryotesPlant and Animal
-Lack a nucleus-Lack organelles-Generally small-Have cell wall-Have cell membrane-Have flagella-DNA in a loop-Have ribosomes
-Have a nucleus-Have organelles-Generally larger-More complex-Have cytoskeleton (animal cells)-Have cell membrane-Have DNA in chromosomes
PROKARYOTIC DOES NOT MEAN SINGLE CELLED
There are mulitcelled prokaryotes and single celled eukaryotes
Ex: single celled eukaryotic sperm cell