Frederick Griffith documented bacterial transformation. Which statement is true concerning his experiments? DNA that was not contained within a live cell caused the death of the host organism. DNA from dead Streptococcus cells entered live cells and altered the live cell's characteristics. The two strains of Streptococcus were visually indistinguishable. Heat treatment of the Streptococcus strains destroyed the DNA molecules.

Frederick Griffith documented bacterial transformation. Which statement is true concerning his experiments? DNA that was not contained within a live cell caused the death of the host organism. DNA from dead Streptococcus cells entered live cells and altered the live cell's characteristics. The two strains of Streptococcus were visually indistinguishable. Heat treatment of the Streptococcus strains destroyed the DNA molecules.

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter10: Biotechnology

Section: Chapter Questions

Problem 9SQ

See similar textbooks

Similar questions

You are given two samples of DNA, one from Clostridium perfringens and the other from Mycobacterium tuberculosis. Unfortunately, the labels on the tubes of DNA were accidentally removed, and you do not know which DNA sample belongs to which organism. As you were doing some work with Escherichia coli in the lab, you also have some of its DNA available as well. The %G + %C values for each of the organisms is known (C. perfringens, 27%; M. tuberculosis, 67%; E. coli, 50%). Based upon this information, how could you quickly determine the source of the DNA for your two samples?
Can you say that the microbial composition changes over time in each of the body locations? Give two pieces of evidence. Why do you think the scientists also tested the soil around the cadaver? The study was done with mice and their cadavers decomposed on soil graves in the University of Colorado Transgenic Facility. Do you think the graphs would have looked different if the decomposition events would have happened outside during the hot summer months? Explain.
Imagine that you are a student in Alfred Hershey and Martha Chase’s lab in the late 1940s. You are given five test tubes containing E. coli bacteria infected with T2 bacteriophages that have been labeled with either 32P or 35S. Unfortunately, you forget to mark the tubes and are now uncertain about which were labeled with 32P and which with 35S. You place the contents of each tube in a blender and turn it on for a few seconds to shear off the phage protein coats. You then centrifuge the contents to separate the protein coats and the cells. You check for thepresence of radioactivity and obtain the following results. Which tubes contained E. coli infected with 32P-labeled phage? Explain your answer.
How will you know if the bacterial cells were transformed during the lab? notes are attached below
Imagine that you are a student in Alfred Hershey and Martha Chase’s lab in the late 1940s. You are given five test tubes containing E. coli bacteria infected with T2 bacteriophages that have been labeled with either 32P or 35S. Unfortunately, you forget to mark the tubes and are now uncertain about which were labeled with 32P and which with 35S. You place the contents of each tube in a blender and turn it on for a few seconds to shear off the phage protein coats. You then centrifuge the contents to separate the protein coats and the cells. You check for the presence of radioactivity and obtain the following results. Which tubes contained E. coli infected with 32P-labeled phage? Explain your answer. Tube number Radioactivity present in 1 Cells 2 Protein coats 3 Protein coats 4 Cells 5 Cells
Below are the events that occur when recombinant DNA procedure is performed. Identify and describe each process. Name enzyme X _____________ Outline process B Outline the process which takes place inside the bacterium.
The figure below illustrates the stages of production of useful medical products using recombinant DNA technology. Closely study the figure then answer the Activity 1 questions that follow: Human cell Bacterium 1. DNA Plasmid DNA Human insulin-producing gone 2. DNA is cut with restriction Bacterial DNA with human gone inserted enzymes. 3. Plasmid is reintroduced into bacterium. 4. Engineered bacteria multiply producing insulin. 5. Insulin is Human insulin separated and purified to produce human insulin. 6. Insulin injected into patient 1. What is a plasmid? Make a diagram of bacterial cell containing a plasmid. 2. How do you explain the selection of plasmids for carrying the desired gener 3. Follow the steps of human insulin production, then 4. Make a diagram for the production of growth hormone. first
Who contributed in the field of microbiology? Each name should only be used once. Developed vaccine against smallpox [ Choose ] Discovered penicillin [Choose ] Disproved spontaneous generation [ Choose ) Was first to observe bacteria [ Choose ] Proved that microorganisms can cause [ Choose ] disease Was first to observe cells and name them [ Choose ] Described serotypes of streptococci [ Choose] Made first recombinant DNA [ Choose ] Studied regulation of bacterial genes [ Choose]
The figure below illustrates the stages of production of useful medical products using recombinant DNA technology. Closely study the figure then answer the Activity 1 questions that follow: Human cell Bacterium 1. DNA Plasmid DNA Human insulin-producing gone 2. DNA is cut with restriction Bacterial DNA with human gone inserted enzymes. 3. Plasmid is reintroduced into bacterium. 4. Engineered bacteria multiply producing insulin. 5. Insulin is separated and purified to produce human insulin. Human insulin Itulin 6. Insulin injected into patient 1. What is a plasmid? Make a diagram of bacterial cell containing a plasmid. 2. How do you explain the selection of plasmids for carrying the desired gener 3. Follow the steps of human insulin production, then 4. Make a diagram for the production of growth hormone. first
You are using bacterium E.coli to synthesize a protein from recombinant DNA. The protein remains in the bacterium, so you must lyse the cell in order obtain the protein. Describe the steps you will take to disrupt the microbe.
frederic griffith used the word transformation to describe the changes in bacteria that he observed. which is the most useful definition of transformation?
A) A bacterium that has an F plasmid is able to do which of the following? Group of answer choices resist antibiotics survive in very harsh environments such as hypersaline lakes grow a cell wall form conjugation tubes and pass on their DNA to other bacteria reproduce sexually B) horizontal gene transfer refers to bacteria's ability to Group of answer choices make peptidoglycan for their cell walls transfer DNA to offspring, or "daughter" cells transfer DNA only when on horizontal surfaces, such as a table top transfer pieces of DNA to other cells in the population engage in mutualisms with certain species