1. Prokaryotes

2. What is it? Single-celled organism No nucleus
No membrane-bound organelles

3. Prokaryote means…
Pro- = greek for “before”
(Don’t be confused with the latin pro which means “in favor of”)
-karyote = greek for “nut”, AKA the nucleus
Prokaryotes were around before cells evolved to have a nucleus to protect the DNA

4. Are we prokaryotes? No! Animal and plants cells are eukaryotes
Eu- = greek for “true” (Eukaryotes have a nucleus!)

5. Let’s compare! No nucleus Single-celled No membrane-bound organelles
PROKARYOTE
EUKARYOTE
No nucleus
Single-celled
No membrane-bound organelles
Nucleus
Single- or multi-cellular
Membrane-bound organelles

6. Let’s compare!
PROKARYOTE
EUKARYOTE
SIMPLE
COMPLEX

7. Prokaryote example
BACTERIA!

8. Prokaryote parts
CAPSULE

9. Prokaryote parts
CELL WALL

10. Prokaryote parts
CELL MEMBRANE

11. Prokaryote parts
PILUS (PILI)

12. Prokaryote parts
NUCLEOID (DNA)

13. Prokaryote parts
RIBOSOMES

14. Prokaryote parts
FLAGELLUM

15. Endosymbiotic Theory Mitochondria and chloroplasts have Their own DNA
Two layers of membrane

16. Endosymbiotic Theory Mitochondria and chloroplasts have
Their own DNA
Two layers of membrane
Scientists hypothesize that these organelles were once single-celled prokaryotes that formed a symbiotic relationship with early eukaryotes.

17. Endosymbiotic Theory