designed as a short introduction to prokaryotes as part of 1.2 IB Biology course

1. Prokaryotic cells

2. Prokaryotic cells: the bacteria

3. Prokaryotic cells
 Primitive
 No nucleus containing DNA
 No membrane-bound (or “membraneous”)
organelles
 Varied metabolisms: fermentation, aerobic
respiration, photosynthesis, nitrogen
fixation

4. Prokaryotic cell
 1-10 micrometers

5. Draw:
 Cell wall
 Plasma membrane
 Cytoplasm
 Ribosomes
 Nucleoid region
(area of naked
DNA)
 Flagellum
 Mesosome
 Fimbriae
 Pilli
 (these last
two look the
same

6. Electron
micrograph
of bacterium

8. Binary fission
Not mitosis as no
Chromosomes
are formed