conjugation enetic variation biotic resistance ONA replication binary fission tic recombination antibiotics mutations may be acquired from other cells through combines DNA from different cells, resulting in Serious bacterial infections are treated with may not kill bacteria with genes for may result from contribute to contributes to is passed from parent to offspring through are mistakes that usually occur during kill sensitive bacteria or interfere with occurs during propagates through a growing bacterial population via

conjugation enetic variation biotic resistance ONA replication binary fission tic recombination antibiotics mutations may be acquired from other cells through combines DNA from different cells, resulting in Serious bacterial infections are treated with may not kill bacteria with genes for may result from contribute to contributes to is passed from parent to offspring through are mistakes that usually occur during kill sensitive bacteria or interfere with occurs during propagates through a growing bacterial population via

Biology: The Unity and Diversity of Life (MindTap Course List)

14th Edition

ISBN:9781305073951

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter8: Dna Structure And Function

Section: Chapter Questions

Problem 3DAA: HersheyChase Experiments The graph shown in FIGURE 8.5 is reproduced from an original 1952...

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HersheyChase Experiments The graph shown in FIGURE 8.5 is reproduced from an original 1952 publication by Hershey and Chase. Bacteriophage were labeled with radioactive tracers and allowed 10 infect bacteria. The virusbacteria mixtures were then whirled in a blender to dislodge any viral components attached to the exterior of the bacteria. Afterward, radioactivity from the tracers was measured. FIGURE 8.5 Detail of Alfred Hershey and Martha Chases 1952 publication describing their experiments with bacteriophage. Infected bacteria refers to the percentage of bacteria that survived the blender. How did the researchers know that the radioisotopes in the fluid came from outside of the bacterial cells and not from bacteria that had been broken apart by whirling in the blender?
HersheyChase Experiments The graph shown in FIGURE 8.5 is reproduced from an original 1952 publication by Hershey and Chase. Bacteriophage were labeled with radioactive tracers and allowed 10 infect bacteria. The virusbacteria mixtures were then whirled in a blender to dislodge any viral components attached to the exterior of the bacteria. Afterward, radioactivity from the tracers was measured. FIGURE 8.5 Detail of Alfred Hershey and Martha Chases 1952 publication describing their experiments with bacteriophage. Infected bacteria refers to the percentage of bacteria that survived the blender. After 4 minutes in the blender, what percentage of each isotope was extracellular?
HersheyChase Experiments The graph shown in FIGURE 8.5 is reproduced from an original 1952 publication by Hershey and Chase. Bacteriophage were labeled with radioactive tracers and allowed 10 infect bacteria. The virusbacteria mixtures were then whirled in a blender to dislodge any viral components attached to the exterior of the bacteria. Afterward, radioactivity from the tracers was measured. FIGURE 8.5 Detail of Alfred Hershey and Martha Chases 1952 publication describing their experiments with bacteriophage. Infected bacteria refers to the percentage of bacteria that survived the blender. The extracellular concentration of which isotope increased the most with blending?
HersheyChase Experiments The graph shown in FIGURE 8.5 is reproduced from an original 1952 publication by Hershey and Chase. Bacteriophage were labeled with radioactive tracers and allowed 10 infect bacteria. The virusbacteria mixtures were then whirled in a blender to dislodge any viral components attached to the exterior of the bacteria. Afterward, radioactivity from the tracers was measured. FIGURE 8.5 Detail of Alfred Hershey and Martha Chases 1952 publication describing their experiments with bacteriophage. Infected bacteria refers to the percentage of bacteria that survived the blender. Before blending what percentage of each isotope. 35S and 32P, was extracellular (outside the bacteria)?
HersheyChase Experiments The graph shown in FIGURE 8.5 is reproduced from an original 1952 publication by Hershey and Chase. Bacteriophage were labeled with radioactive tracers and allowed 10 infect bacteria. The virusbacteria mixtures were then whirled in a blender to dislodge any viral components attached to the exterior of the bacteria. Afterward, radioactivity from the tracers was measured. FIGURE 8.5 Detail of Alfred Hershey and Martha Chases 1952 publication describing their experiments with bacteriophage. Infected bacteria refers to the percentage of bacteria that survived the blender. Do these results imply that viruses inject DNA or protein into bacteria? Why or why not?
Match the statement with the correct term Statement- -A group of HFr bacteria is mixed with a group of F– bacteria. After several days, the F- bacteria contain part of the Hfr chromosome -The uptake of DNA into a bacterium from its environment -Requires the presence of a plasmid -uses bacteriophage to provide new genetic information Terms- -transduction -conjugation -translation -transformation -transposition
Define the following terms:a. processivityb. replisomec. exonucleased. DNA ligasee. replication fork
Re-write the following false statement to make it true: A bacterial replication fork is asymmetrical because it contains two DNA polymerase molecules that are structurally distinct.
Define the following terms:a. Chargaff’s rulesb. constitutive heterochromatinc. bacteriophaged. replication-dependent histonese. replication-independent histones
Rolling circle replication is important for: plaese explain why you chooice the answer a. A. conjugation b. B. transformation c. C. transduction d. A and B e. A and C
Conjugation using ________ will result in the transmission of a segment of chromosomal DNAfrom one host to another using a plasmid. Question 25 options: F‑strain High frequency recombination (hfr) strain F+strain F plasmid F' plasmid
Multiple Matching. Fill in the blanks with all the letters of thewords below that apply.________ site of protein synthesis________ carries the codon________ carries the anticodon________ a process synonymous with mRNA synthesis________ bacteriophages participate in this transfer________ duplication of the DNA molecule________ process in which transcribed DNA code is decipheredinto a polypeptide________ involves plasmidsa. replicationb. tRNAc. conjugationd. ribosomee. transductionf. mRNAg. transcriptionh. transformationi. translationj. none of these