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Bacteria
Bacteria Notes
29
Biology
9th Grade
03/03/2012

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Term
CELL WALL
Definition
Protects the cell & gives it shape
Term
OUTER MEMBRANE
Definition
Protects the cell against some antibiotics (only present in gram-negative)
Term
CELL MEMBRANE
Definition
Regulates movement into & out of the cell; contains enzymes important to cellular respiration.
Term
PLASMID
Definition
Circular piece of DNA that contains some genes obtained through genetic recombination.
Term
LIST THE CHARACTERISTICS OF ARCHAEBACTERIA
Definition
- Have unusual lipids

- Have introns in their DNA
Term
Which group of Archaebacteria convert H2 and CO2 in methane? Where are they found?
Definition
Methanogens
Term
Where do extreme Halophiles live?
Definition
Great Salt Lakes
Term
Which group of Archaebacteria live in extreme acidic & hot environment
Definition
Thermocidophiles
Term
Fossil evidence indicates bacteria existed on earth about how many years ago?
Definition
about 3.5 BYA
Term
When did eukaryotes begin their existence?
Definition
2.5 BYA
Term
How are bacteria identified?
Definition
Term
List and identify the 3 shapes of bacteria
Definition
1) Bacilli (rod-shaped)
2)
3)
Term
100 trillion cells make-up the human body, how many are bacterial? What percent?
Definition
90% bacterial
Term
How much bacterial weight do we excrete each year?
Definition
Term
List the characteristics of Eubacteria:
Definition
- Single Cell Prokaryote

-
Term
What is the process by which bacteria replicate?
Definition
Binary Fission
Term
What process can lead to genetic diversity in bacteria?
Definition
Conjugation
Term
Why can the endospore allow bacteria to survive for thousands of years?
Definition
Protects the cell against harsh environmental conditions
Term
What is another organism responsible for fixing atmospheric nitrogen?
Definition
Decomposers
Term
List human uses of bacteria:
Definition
Food - baking and beverages
Clean up oil spills, rivers, streams
Make pharmaceuticals
Aid in digestion
Term
What is a pathogen?
Definition
Bacteria that causes disease or a disease causing agent.
Term
List bacterial diseases and its effect on the human body:
Definition
Term
METABOLIC ACTIVITY OF BACTERIA:

Chemoheterotroph
Definition
Organisms that must take in organic molecules for both energy and a supply of carbon.
Term
METABOLIC ACTIVITY OF BACTERIA:

Photoheterotroph
Definition
Organisms that are photosynthetic, but still need to take in organic compounds as a carbon source.
Term
METABOLIC ACTIVITY OF BACTERIA:

ChemoAUTOtroph
Definition
Make organic carbon molecules from carbon dioxide and other compounds using energy from chemical reactions.
Term
METABOLIC ACTIVITY OF BACTERIA:

Photoautotroph
Definition
Use energy from sunlight to convert carbon dioxide and water to carbon compounds.
Term
RELEASE OF ENERGY IN BACTERIA:

Obligate Aerobes
Definition
Organisms that require a constant supply of oxygen in order to live. EX: Mycobacterium tuberculosis, the bacterium that causes tuberculosis.
Term
RELEASE OF ENERGY IN BACTERIA:

Obligate Anaerobes
Definition
Do not require oxygen; some may be killed by O2! EX: Clostridium botulinum, found in soil and can be grown in canned food causing fatal food poisoning.
Term
RELEASE OF ENERGY IN BACTERIA:

Facultative Anaera
Definition
Can survive with or w/out O2.
EX: E. coli, can live in the larges intestines contaminated water
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