quiz 5 key

quiz 5 key - Multiple Choice 0.5 points Modify Remove...

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Multiple Choice 0.5 points Modify Remove Question Phage that are isolated from E.coli K12 and then used to infect E.coli K12 cells Answer a. have methylated DNA that protects them from restriction enzymes. b. have unmethylated DNA and are cleaved by restriction enzymes. c. yield a high number of progeny phage. d. a and c. e. b and c. f. none of the above Question 2 Multiple Choice 0.5 points Modify Remove Question E. coli plasmids generally carry drug resistance genes, but phage vectors do not. Why? Answer a. You know the phage has entered the cell because it makes a plaque on the lawn of bacteria, therefore you don't need to select for infection. b. Phage lyse the cells, so they don't have any opportunity to express the drug resistance. c. Phage are very efficient at inserting DNA into cells, so you don't need to select for infection. d. all of the above. Question 3 Multiple Choice 0.5 points Modify Remove Question Suppose you are interested in studying the tissue specific transciptional regulation of a steroid hormone receptor. Would you
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This note was uploaded on 02/03/2009 for the course LIFESCI 3 taught by Professor Staff during the Fall '06 term at UCLA.

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quiz 5 key - Multiple Choice 0.5 points Modify Remove...

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