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Chapter 8
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What are the 3 mechanisms of bacteria use to adapt to their environments?
Natural Selection
Mutation
Gene Transfer
What is a genetic change?
A change that alters an organisms genotype?
What are the observable characteristics of an organism?
Phenotype
What is a wild-type organism?
Properties are similiar to the organsim first isolated in nature.
What is a spontaneous mutation?
An inhertiable spontaneous change in the base sequence of DNA
What is a base substitution?
Incorrect base is incorporated in DNA
What is a point mutation?
One base pair is changed
What is a frame shift mutation?
When the codons shift, and the reading frame is moved.
What are the mechanisms of Gene Transfer?
DNA-mediated transformation
Transduction
Conjugation
What is transformation?
The transfer of naked DNA from one bacterium to another
What is transduction?
DNA transfer via a virus
What is conjugation?
Bacterial "sex"
What is a pilus structure?
Long protien structure that comes out of the cell
The "penis"
What is a plasmid?
A circular strand of DNA that lies outside the chromosme
Author
kelleeeh
ID
19966
Card Set
Chapter 8
Description
Microbiology: A human perspective - Chapter 8
Updated
2010-05-19T21:31:05Z
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