Prokaryotes - introduction IB Biology

Prokaryotic cells

Prokaryotic cells: the bacteria

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Prokaryotic cells

Primitive

No nucleus containing DNA

No membrane-bound (or “membraneous”)

organelles

Varied metabolisms: fermentation, aerobic

respiration, photosynthesis, nitrogen

fixation

Prokaryotic cell

1-10 micrometers

Draw:

Cell wall

Plasma membrane

Cytoplasm

Ribosomes

Nucleoid region

(area of naked

DNA)

Flagellum

Mesosome

Fimbriae

Pilli

(these last

two look the

same

Electron micrograph of bacterium

Binary fission

Not mitosis as no

Chromosomes

are formed

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Prokaryotes - introduction IB Biology