Genetics: Analysis and Principles
6th Edition
ISBN: 9781259616020
Author: Robert J. Brooker Professor Dr.
Publisher: McGraw-Hill Education
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Chapter 18.3, Problem 1COMQ
A mutation in phage
results in 10-fold greater transcription of the cII gene. How do you think this mutation would affect the reproductive cycles of the phage?
a. The lytic cycle would be favored.
b. The lysogenic cycle would be favored.
c. Neither cycle could occur.
d. None of the above would happen.
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During transduction via phage P1,a. any small fragment of the bacterial chromosome may betransferred to another bacterium by a phage.b. only a specific fragment of DNA may be transferred to anotherbacterium by a phage.c. any small fragment of the bacterial chromosome may betransferred during conjugation.d. only a specific fragment of DNA may be transferred duringconjugation.
A mutation in phage λ results in 10-fold greater transcription ofthe cII gene. How do you think this mutation would affect thereproductive cycles of the phage?a. The lytic cycle would be favored.b. The lysogenic cycle would be favored.c. Neither cycle could occur.d. None of the above would happen.
What happens when T2 phages are grown with radioactive phosphorus?
a. Their DNA becomes radioactive.
b. Their proteins become radioactive.
c. Their DNA is found to be medium density in a centrifuge tube.
d. They are no longer able to transform bacterial cells.
e. They transfer their radioactivity to E. coli chromosomes during infection.
...Explain your answer.
Chapter 18 Solutions
Genetics: Analysis and Principles
Ch. 18.1 - 1. What is a common feature found in all viruses?...Ch. 18.1 - 2. Viral genomes can be
a. DNA or RNA.
b....Ch. 18.2 - Prob. 1COMQCh. 18.2 - Prob. 2COMQCh. 18.3 - A mutation in phage results in 10-fold greater...Ch. 18.3 - 2. The cl gene that encodes the λ repressor has...Ch. 18.4 - A viral protein that is needed to make HIV DNA is...Ch. 18.4 - Prob. 2COMQCh. 18.4 - After HIV components are made, what is the correct...Ch. 18 - 1. Discuss why viruses are considered nonliving.
Ch. 18 - What structural features are common to all...Ch. 18 - 3. What are the similarities and differences among...Ch. 18 - Prob. 4CONQCh. 18 - Prob. 5CONQCh. 18 - Prob. 6CONQCh. 18 - Prob. 7CONQCh. 18 - Prob. 8CONQCh. 18 - Prob. 9CONQCh. 18 - Prob. 10CONQCh. 18 - 11. What is a prophage, a provirus, and an...Ch. 18 - Prob. 12CONQCh. 18 - Prob. 13CONQCh. 18 - 14. With regard to promoting the lytic or...Ch. 18 - 15. How do therepressor and the cro protein affect...Ch. 18 - Prob. 16CONQCh. 18 - Figure 18.11 shows a genetic switch that controls...Ch. 18 - Prob. 18CONQCh. 18 - Prob. 19CONQCh. 18 - Explain the role of RNase H (a component of...Ch. 18 - Prob. 21CONQCh. 18 - Prob. 22CONQCh. 18 - Prob. 23CONQCh. 18 - 24. Compare and contrast the roles of fully...Ch. 18 - 25. Describe the role of the Gag polyprotein...Ch. 18 - Prob. 26CONQCh. 18 - Prob. 27CONQCh. 18 - 1. Discuss how researchers determined that TMV is...Ch. 18 - Prob. 2EQCh. 18 - What is a reconstituted virus?Ch. 18 - Following the infection of healthy tobacco leaves...Ch. 18 - Prob. 5EQCh. 18 - Prob. 6EQCh. 18 - A researcher identified a mutation in PR of phage ...Ch. 18 - Experimentally, when an E. coli bacterium already...Ch. 18 - 9. A bacterium is exposed to a drug that inhibits...Ch. 18 - This question combines your knowledge of bacterial...Ch. 18 - Prob. 1QSDCCh. 18 - 2. Certain environmental conditions such as...Ch. 18 - 3. Browse the Internet to determine the drugs that...
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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
- In Hershey and Chase’s experiment investigating which biological molecule carries genetic information, they found that phage DNA with radiolabeled phosphorus was retained in bacterial cells after transduction. To conclude that DNA is the genetic material, what assumption did they have to make? (photo linked) A. Protein does not enter the bacterium during transduction. B. DNA does not stay in the media after transduction. C. All of the phage DNA was radiolabeled. D. Bacteria can be transduced by phage.arrow_forwardSome scientists are trying to engineer bacteriophageto treat bacterial infections in humans when theinfections do not respond to chemical antibiotics.a. What possible advantages might phage therapyhave over antibiotic therapy?b. Describe potential difficulties that would need tobe overcome for phage therapy to succeed.c. How might researchers best confront the issue thatbacterial cells could become resistant to bacteriophage just as they could to antibiotics?arrow_forwardIn the Hershey and Chase experiment involving T2 phage,a. most of the 32P entered the bacterial cells whereas most of the 35S did not.b. most of the 35S entered the bacterial cells whereas most of the 32P did not.c. equal amounts of 32P and 35S entered the bacterial cells.d. none of the above was observed.arrow_forward
- During the late stage T4 phage infection, the phage DNA is synthesized by Select one: а. the DNA polymerase encoded by T4 genome. the ADP-ribosylated DNA polymerase encoded by E. coli genome. O c. the ADP-ribosylated DNA polymerase encoded by T4 genome. d. the DNA polymerase encoded by E. coli genome.arrow_forwardPhage conversion in which viruses add genes to a bacterial cell can be considered to be a form of a. standard inheritance. b. horizontal gene transfer. c. vertical gene transfer. d. parasitism.arrow_forwardWhich of the following best describes the mechanism of action of the antibiotic streptomycin? A. it disrupts protein synthesis in resistant bacteria. B. Streptomycin inhibits cell wall synthesis in all bacterial species. C. Streptomycin creates mutations in bacteria which cause them to become resistant. D. It disrupts protein synthesis in nonresistant bacteria.arrow_forward
- Some scientists are trying to engineer bacteriophageto treat bacterial infections in humans when theinfections do not respond to chemical antibiotics.a. What possible advantages might phage therapyhave over antibiotic therapy?arrow_forwardSome strains of Escherichia coli bacteria have acquired the ability to produce the harmful Shiga toxin, normally produced by Shigella dysenteriae. Which statements best explain why this occurs? Mark all that apply. A. conjugation between two different species of bacteria allowed both strains of bacteria to express a virulence factor B. transformation resulted in expression of a virulence factor C. horizontal gene transfer between different species of bacteria D. transduction of a specific gene resulted in expression of new traitsarrow_forwardThe function of CRISPR gene cluster in Streptococcus pyogenes is to Select one or more: a. destroy phage DNA in the bacteria. O b. protect phage DNA in the bacteria. Oc. repair the damaged DNA in its genome. O d. delete the specific genes in its genome.arrow_forward
- Within prokaryotic organisms, . takes up DNA released by a donor cell that was lysed. is the process of exchanging genetic material that occurs when a host cell Select one: O a. Conjugation O b. Transformation c. Plasmid mediated gene transfer O d. Phage mediated gene transfer O e. Transductionarrow_forwardThe likelihood of co-transformation of two bacterial genes increases: a. As their distance apart on the chromosome increases b. As their distance apart on the chromosome decreases c. As the transducing phage enter the lytic cycle d. As recombination rate decreases e. None of these is correcarrow_forwardIn Hershey and Chase’s experiment investigating which biological molecule carries genetic information, they found that phage DNA with radiolabeled phosphorus was retained in bacterial cells after transduction. To conclude that DNA is the genetic material, what assumption did they have to make? A. Protein does not enter the bacterium during transduction. B. DNA does not stay in the media after transduction. C. All of the phage DNA was radiolabeled. D. Bacteria can be transduced by phage.arrow_forward
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