dnaqz - 1. Extracts of pathogenic bacteria can transform...

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Sheet1 Page 1 1. Extracts of pathogenic bacteria can transform harmless bacteria to harmful bacterial unless ____ enzymes are added to th e a. a protein-digesting b. b mRNA-digesting c. c tRNA-digesting d. d DNA-digesting e. e any of these ____ 2. Bacteriophages are a. a large bacteria. b. b pathogenic bacteria. c. c viruses that infect bacteria. d. d virus-eating bacteria.
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Sheet1 Page 2 e. e viruses that infect eukaryotic cells. ____ 3. DNA contains ____ but NOT ____. a. a sulfur b. b phosphorus c. c potassium d. d sulfur e. e proteins ____ 4. The significance of the Hershey and Chase experiments in which 32P and 35S were used is that a. a DNA labeled with 35S and proteins labeled with 32P can be traced in the course of an experiment. b. b they demonstrated that DNA labeled with 35S is transferred from the bacteriophage to the virus.
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Sheet1 Page 3 c. c they established that proteins labeled with 35S become deactivated. d. d they demonstrated that bacteriophages transfer their DNA, not their protein coats, into their hosts. e. e DNA may be the hereditary material ____ 5. If a mixture of bacteriophages, some labeled with radioactive sulfur and others labeled with radioactive phosph o a. a radioactive sulfur. b. b radioactive phosphorus. c. c both radioactive sulfur and phosphorus. d.
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This note was uploaded on 07/21/2011 for the course BIO 101 taught by Professor Staff during the Spring '08 term at Northern Virginia Community College.

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dnaqz - 1. Extracts of pathogenic bacteria can transform...

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