Bacteria. Title. Do Disinfectants Work?. Purpose. Determine how well disinfectants control the growth of bacteria. Research. Bacteria are prokaryotes. Genetic Material in their cells is not contained in a nucleus. (prokaryote: no nucleus/bacteria) 2. Bacteria, living unicellular organism
Do Disinfectants Work?
Determine how well disinfectants control the growth of bacteria.
(prokaryote: no nucleus/bacteria)
2. Bacteria, living unicellular organism
3. Three shapes
4. Shape determined by
composition of cell wall
5. Flagellum, long whip-like structure that extends from the cell membrane out the cell wall.
6. Flagellum help the cell to move, like kicking you legs in water.
7. Bacteria may have many, one or none.
8. If bacteria have none, can not
move on their own.
~ ancient bacteria
~ Been around before dinosaurs. Resembles Earth’s first life forms.
~ Live in extreme environments
extreme heat: hot springs
extreme acid: lemon juice
extreme salt: Utah Great Salt Lake
extreme moist: bottom of swamps
extreme waste: sewage systems.
This bacteria is responsible for the foul smells
~ Can not handle extreme conditions
~ They live everywhere else
~ Help maintain some of Earth’s physical conditions,
helping other organisms to survive.
Scientist think, these bacteria, are responsible for the formation of Earth’s atmosphere. Being autotrophic, making their own food, their by-product was oxygen. Descendants of these bacteria are responsible for about 20% of our oxygen
How do you think disinfectants work?
Do they really work?
random place in a zigzag pattern
zigzagthe swab down the D side. Do not poke
the swab in the agar. Cover petri dish quickly.
5. Person C, use antibacterial
cleaner washing the swabbed place.
6. Person D, repeat step 4, only zigzag
down the C side.
Draw and record your data in the following