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Molecular Biology

Part One.

The genetics of Viruses and Prokaryotes

 

  1. Why are prokaryotes and viruses used for Genetic Experiments?

 

 

 

 

  1. What are the characteristics of viruses?

 

 

 

 

  1. What is a bacteriophage?

 

 

 

 

 

  1. What is the difference between a lytic and lysogenic cyle in the life of a  bacteriophage ?

 

 

 

 

 

  1. What is a prophage?  What is the genetic switch from the lysogenic to the lytic cycle important to the bacteriophage?

 

 

 

 

  1. Explain how recombination occurs in a bacteriophage?

 

 

 

 

 

  1. Why do animal viruses have diverse reproductive cycles.

 

 

 

 

 

  1. What is unique about the life cycle of HIV virus?

 

 

 

 

 

 

  1. How do vectors help to spread viruses?

 

 

 

 

 

 

  1. What is a viroid?

 

 

 

  1. What is a prion?

 

 

 

 

  1. What is a bacterial clone?

 

 

 

 

  1. If Bacteriophages infect bacteria, what appears on the Petri dish to demonstrate the effect of the bacteriophage on the life of the  bacterial cell?

 

 

 

 

  1. Lederberg and Tatum found bacteria that required supplementation with nutrients.  Bacteria that require nutrients in the media are referred to as…………………

 

 

  1. What is conjugation? 

 

 

 

  1. D efine these words

 

 

F plasmid

F pili

 

 

Hfr mutants

 

 

F+

 

 

F-

 

 

 

  1. What is the Hfr ?

 

 

 

 

  1. What is transformation?

 

 

 

 

  1. Define generalized transduction and specialized transduction.

 

 

 

 

 

  1. What is an episome?

 

 

 

 

  1. What is an R factor?

 

 

 

 

  1. What is the significance of a transposable element?