Chapter 11: Problem 7
In Kornberg's initial experiments, it was rumored that he grew E. coli in Anheuser-Busch beer vats. (Kornberg was working at Washington University in St. Louis.) Why do you think this might have been helpful to the experiment?
Chapter 11: Problem 7
In Kornberg's initial experiments, it was rumored that he grew E. coli in Anheuser-Busch beer vats. (Kornberg was working at Washington University in St. Louis.) Why do you think this might have been helpful to the experiment?
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Get started for freeReview the Chapter Concepts list on \(\mathrm{p} .295 .\) These are concerned with the replication and synthesis of DNA. Write a short essay that distinguishes between the terms replication and synthesis, as applied to DNA. Which of the two is most closely allied with the field of biochemistry?
What is the end replication problem?
Several temperature-sensitive mutant strains of \(E .\) coli display the following characteristics. Predict what enzyme or function is being affected by each mutation. (a) Newly synthesized DNA contains many mismatched base pairs. (b) Okazaki fragments accumulate, and DNA synthesis is never completed. (c) No initiation occurs. (d) Synthesis is very slow. (e) Supercoiled strands remain after replication, which is never completed.
While many commonly used antibiotics interfere with protein synthesis or cell wall formation, clorobiocin, one of several antibiotics in the aminocoumarin class, inhibits the activity of bacterial DNA gyrase. Similar drugs have been tested as treatments for human cancer. How might such drugs be effective against bacteria as well as cancer?
You have generated a mutant strain of eukaryotic cells that constitutively express proteins required for translesion DNA synthesis (TLS). Would these cells have a mutator phenotype? Explain. One of the strains that you are working with shows an additional mutation whereby the processivity of a TLS polymerase is increased. What would be the consequence of this mutation?
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