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Microbiology (Chapter 8)
Flashcards for Micro Chapter 8! :)
17
Microbiology
Undergraduate 2
04/30/2012

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Term
Gene Transfer
Definition
The movement of genetic info between organisms
Term
Vertical Gene Transfer
Definition
Genes pass from parents to offspring
Term
Horizontal (lateral) Gene Transfer
Definition
Pass genes to other microbes of same generation
Term
Transformation
Definition
A change in an organisms' characteristics because of transfer of genetic info
Term
Naked DNA
Definition
DNA that has been released from an organism after the cell is lysed and DNA is no longer incorporated
Term
Exonuclease
Definition
An enzyme that cuts up DNA
Term
Transduction
Definition
A method of transferring genetic material using a bacteriophage
Term
Virulent Phage
Definition
  • Capable of causing infection and the destruction and death of a bacterial cell
  • Lytic cell
Term
Temperate Phage
Definition
  • Ordinarily doesn't cause a disruptive infection
  • Lysogenic cycle
Term
Conjugation
Definition
  • Genetic info is transferred from one cell to another
  • Requires contatc between donor (F+, males) and recipient (F-, females)
  • Transfers much larger quantities of DNA
Term
F Plasmids
Definition
  • Circular, double stranded DNA molecule
  • F+ cells contain F (fertility) plasmids and makes F pilus (male, donor)
  • F- cells lack F plasmids (female, recipients)
Term
Resistance (R) Plasmids
Definition
Carry genes that provide resistance to various antibiotics such as cloramphenicol and tetracycline and to heavy metals such as arsenic and mercury
Term
Other Plasmids
Definition
Direct the synthesis of bacteriocidal (bacteria-killing) proteins called bacteriocins
Term
Virulence Plasmids
Definition
Cause disease signs and symptoms
Term
Tumor Inducing (Ti) Plasmids
Definition
Cause tumor formation in plants
Term
Transposition 
Definition
The ability of  a genetic sequence to move from one location to another on the same chromosome
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