Biology (MindTap Course List)
11th Edition
ISBN: 9781337392938
Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher: Cengage Learning
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Chapter 12, Problem 3TYU
In the Hershey-Chase experiment with bacteriophages, (a) harmless bacterial cells permanently transformed into virulent cells (b) DNA was shown to be the transforming factor of earlier bacterial transformation experiments (c) the replication of DNA was conclusively shown to be semiconservative (d) viral DNA was shown to enter bacterial cells and cause the production of new viruses within the bacteria (e) viruses injected their proteins, not their DNA, into bacterial cells
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Students have asked these similar questions
What is transformation? Describe Grifith’s experiment to show transformation? What did he prove from his experiment?
One experiment that showed the DNA carried genetic information was the "Transformation" experiment by Avery, McCarty, and MacLeod where they injected mice with non-pathogenetic bacteria that had been incubated in the remains of pathogenic bacteria. What did they find when they incubated non-pathogenic bacteria in just the protein from the pathogenic bacteria?
In this case there was no transformation
They found that the non-pathogenic bacteria were transformed into pathogenic bacteria
In this case the mice were sickened but did not die
They found that some of the protein could cause transformation but other proteins could not
In Hershey-Chase experiment, bacteriophages protein coats were tagged with radioactive isotope S-32. These phages were used to infect E. coli cells and the cells were further centrifuged to form pellets.
Why was the radioactivity level of S-32 found greater outside the cells compared to the E. coli cell pellets? Explain briefly.
If the experiment is repeated in the same manner but this time the phage protein coats are labelled with isotope X and the phage DNA with isotope Y, which isotope’s radioactivity will be found in greater amounts in the E. coli cell pellets after centrifugation? Explain briefly.
Chapter 12 Solutions
Biology (MindTap Course List)
Ch. 12.1 - Summarize the evidence that accumulated during the...Ch. 12.1 - Prob. 2LOCh. 12.1 - Prob. 1CCh. 12.1 - Prob. 2CCh. 12.2 - Explain how nucleotide subunits link to form a...Ch. 12.2 - Describe how the two strands of DNA are oriented...Ch. 12.2 - Prob. 5LOCh. 12.2 - Prob. 1CCh. 12.2 - Prob. 2CCh. 12.2 - Prob. 3C
Ch. 12.3 - Cite evidence from Meselson and Stahls experiment...Ch. 12.3 - Prob. 7LOCh. 12.3 - Explain the complexities of DNA replication that...Ch. 12.3 - Discuss how enzymes proofread and repair errors in...Ch. 12.3 - Prob. 10LOCh. 12.3 - How did the ability to distinguish old and newly...Ch. 12.3 - What feature of DNA structure causes DNA...Ch. 12.3 - What is the reason that eukaryotic cells require...Ch. 12 - When Griffith injected mice with a combination of...Ch. 12 - Which of the following inspired Avery and his...Ch. 12 - In the Hershey-Chase experiment with...Ch. 12 - The two complementary strands of the DNA double...Ch. 12 - If a segment of DNA is 5 CATTAC 3, the...Ch. 12 - Each DNA strand has a backbone that consists of...Ch. 12 - The experiments in which Meselson and Stahl grew...Ch. 12 - The statement DNA replicates by a semiconservative...Ch. 12 - Topoisomerases (a) synthesize DNA (b) synthesize...Ch. 12 - A lagging strand forms by (a) joining primers (b)...Ch. 12 - The immediate source of energy for DNA replication...Ch. 12 - Which of the following statements about eukaryotic...Ch. 12 - Prob. 13TYUCh. 12 - Prob. 14TYUCh. 12 - Prob. 15TYUCh. 12 - INTERPRET DATA In the Hershey-Chase experiment,...Ch. 12 - EVOLUTION LINK How does DNA being the universal...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- If Avery, Macleod, and McCarty had observed transformation after removing DNA and RNA, but NOT after removing proteins, they would have concluded that _______. Group of answer choices A polysaccharide is the genetic material in Streptococcus pneumoniae RNA is the genetic material in Streptococcus pneumoniae The genetic material in Streptococcus pneumoniae is a protein Mice with diets rich in proteins are resistant to Streptococcus pneumoniae infection The preparations were contaminatedarrow_forwardThe smallpox virus, which actually has a fairly large genome size for a virus (about 190,000 base pairs), must use which of the following enzymes to replicate its nucleic acid? A. DNA-dependent-DNA-polymerase B. RNA-dependent-DNA-polymerase C. DNA-dependent-RNA-polymerase D. RNA-dependent-RNA-polymerase E. reverse transcriptasearrow_forwardWhat is Recombinant DNA technology ? Who created this ?arrow_forward
- Who coined the term Genophore?arrow_forwardThe first publications describing the successful production and intracellular replication of recombinant DNA appeared in the early 1970’s. Since then, there is a long list of breakthroughs achieved by recombinant DNA technology. But which one of the following are NOT on that list? Select more than one answer ifneeded. a) Recombinant Factor VIII protein for the treatment of hemophiliacs b) Positional cloning of over 100 human disease genes c) Bacteria producing human insulin for the treatment of diabetic patients d) Reproductive cloning of over a dozen humansarrow_forwardWhat makes biotechnology different from recombinant DNA technology?arrow_forward
- What type of energy is required for new bacteriophages to be assembled?arrow_forwardExplain the bacterial transformation experiments of Avery and his colleagues and the results they obtained?arrow_forwardHershey and Chase were able to see whether the backteriophage moved genetic material because they used _____________ labels to attach to sulfur and phosphorus.arrow_forward
- What key structural features of the DNA molecule underlie its ability to be faithfully replicated?arrow_forwardWhat is the most logical sequence of steps for splicing foreign DNA into a plasmid and inserting the plasmid into bacterium?I) Transform bacteria with recombinant DNA molecule.II) Cut the plasmid DNA using restriction enzymes.III) Extract plasmid DNA from bacterial cells.IV) Hydrogen-bond the plasmid DNA to non-plasmid DNA fragments.V) Use ligase to seal plasmid DNA to non-plasmid DNA A. III, II, IV, V, I B. I, II, IV, III, V C. III, IV, V, I, II D. II, III, V, IV, Iarrow_forwardWho created the gene gun?arrow_forward
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