Microbiology

DNAs were allowed to hybridize to each other.  The resulting double helix structures were isolated and visualized via electron microscopy:

 SHAPE  \* MERGEFORMAT A. (5pnts) What is a revertant mutation (in general)?

B. (5pnts) What was the genetic event that caused the original lac- mutation (ie did not allow for the expression of lacZ, lacY, or lacA)?

C. (5pnts) Why did this event result in failure to produce permease and transacetylase?

D. (5pnts) What is the nature of the Type I Reverting mutations?


E. (5pnts) What is the nature of the Type II Reverting mutations?


F. (5pnts) What is the nature of the Type III Reverting mutations?