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BIO 230 Microbiology III
Size and structure of Bacterial Cells
22
Biology
Undergraduate 2
07/16/2009

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Term

Coccus

 

Bacillus

 

Spiral

Definition
Three basic shapes of bacteria that make up 95% of all bacterial cells.
Term

Coccus

(cocci - pl.)

Definition
Spherical bacterial cell.
Term
Micrococcus
Definition
Arrangement of coccus bacteria where one cell is not connected to other cells.
Term
Diplococcus
Definition
Arrangement of coccus bacteria where cells are found in pairs.
Term
Streptococcus
Definition
Arrangment of bacteria where coccus cells are found in chains or strands.
Term
Staphylococcus
Definition
Arrangment of bacteria where coccus cells are found in bunches.
Term
Tetrad
Definition
Arrangment of bacteria where coccus cells are found in groups of four.
Term
Sarcina
Definition
Arrangment of bacteria where coccus cells are found in cubes.
Term
.5 to 1 μm
Definition
Average diameter of a coccus cell.
Term

.5 μm wide

1-5 μm long  

Definition
Average width and length of a bacillus cell.
Term

Bacillus

(bacilli - pl.)

Definition
Rod shaped bacterial cell.
Term

diplobacillus

streptobacillus

bacillococcus

Definition
Arrangements in which a bacillus bacterial cell is found.
Term

spirillum

 

spirochete

 

vibrio

Definition
3 Forms of spiral shaped bacteria.
Term
Vibrio
Definition
Form of spiral bacteria that is an incomplete spiral or comma-shaped.
Term
Spirillum
Definition
Form of spiral-shaped bacteria that is a thick, rigid spiral.
Term
Spirochete
Definition
Form of a spiral-shaped bacteria that is a thin, flexible spiral.
Term

1 μm wide

5-50 μm long

Definition
Average width and length of spirillum bacteria.
Term

.5 μm wide

5-25 μm long

Definition
Average width and length of a spirochete bacteria.
Term
Diplococcus and streptococcus
Definition
Division in one plane produces these types of arrangements in coccus bacterial.
Term
Tetrad
Definition
Division in two planes produces this type of arrangment in coccus bacteria.
Term
Sarcina
Definition
Division in three planes produces this type of arrangment in coccus bacteria.
Term
Staphylococcus
Definition
Division in random planes produces this type of arrangement in coccus bacteria.
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