DiplococciNeisseria gonorrhoeae

StreptococciStreptococcus pyogenes

StaphylococciStaphylococcus aureus

Gram + and Gram - cocci

BacilliEscherichia coli

Spiralsspirochetes & spirillum

Filament

Filaments

VibrioVibrio cholerae

Epulopiscium fishelsoni

Thiomargarita namibiensis

Bacteria are traditionally divided into two major categories. What are they and what are the differences that distinguish the two categories (color is an insufficient answer)?

THE QUESTION:

THE ANSWER:

Bacteria have been divided into Gram positive and Gram negative. Gram positive bacteria have a thicker cell wall (20-80nm) than Gram negative bacteria (2-7 nm). Gram negative bacteria also have an outer membrane outside of the cell wall.

Thiomargarita namibiensis

Magnetosomes

Magentospirillum magnetotacticum

Cellulose and Starch

Glycogen

• Sugar storage form in animals

• Large stores in muscle and liver cells

• When blood sugar decreases, liver cells degrade glycogen, release glucose