Structure and Function Bacteria Structure and Function

Characteristics of Bacteria

Bacterial Structure 18. Microscopes are used to view prokaryotes 19. No nucleus or membrane-bound organelles 20. Contain ribosomes(yes) 21. Single, circular chromosome in nucleoid region

Bacterial Cell 23. 22.

Protection Cell Wall made of 24. Peptidoglycan May have a sticky 25. coating called the Capsule for attachment to host or other bacteria

Sticky Bacterial Capsule

Bacterial Structure Have small rings of DNA called Plasmids(26.) Unicellular Small in size 27.(0.5 to 2μm) PLASMIDS

Bacterial Structure Most grow best at 31. pH of 6.5 to 7.0 32. Many act as decomposers recycling nutrients 33. Some cause disease

33. Staphylococcus Bacterial

Useful Bacteria 34. Other uses for bacteria include making yogurt, cheese, and buttermilk.

Pili 42. Short protein appendages 43. Smaller than flagella

Bacterial Shapes

Shapes Are Used to Classify 45 a. Bacillus: Rod shaped b. Coccus: Spherical (round) c. Vibrio: Comma shaped with flagella d. Spirillum: Spiral shape e. Spirochete: wormlike spiral shape

Grouping of Bacteria 46. a. Diplo- Groups of two b. Strepto- chains c. Staphylo- Grapelike clusters

Diplococcus

Streptococcus Causes Strep Throat

Staphylococcus

48.Bacillus - E. coli

Streptobacilli

Spirillum

Spirochetes