Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 19, Problem 8TY
Summary Introduction
Introduction: There are three modes of transfer of genetic material that takes place in the bacteria. The experiments conducted by researchers Lederberg and Tatum showed the presence of transforming principle between the bacterial members.
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The process by which one bacterial cell transfers DNA to another is:
a.
fission
b.
gametic fusion
c.
conjugation
d.
lysis
e.
fusion
Genetic information can be transferred horizontally from one bacterial cell to another cell of the "same generation" (versus daughter cells), leading to genetic recombination, by all of the following EXCEPT:
A. Gene expression (transcription/translation/protein synthesis)
B. Transformation
C. Conjugation
D. Transduction
E. None of the other four answers (all are mechanisms of “horizontal transfer” genetic recombination)
The primary advantage of conjugation is that ita. is the first step in the formation of a biofilm.b. allows prokaryotes to inject toxins into host cells.c. shuffles genes—including some that enhance survival—among cells.d. provides a mechanism by which bacteria avoid being infected withviruses.
Chapter 19 Solutions
Biology
Ch. 19.1 - Prob. 1CSCh. 19.2 - Prob. 1CSCh. 19.2 - Viral Reproductive Cycles Concept Check: From the...Ch. 19.4 - Genetic Properties of Bacteria Core Skill:...Ch. 19.4 - Prob. 1CCCh. 19.4 - Genetic Properties of Bacteria Concept Check:...Ch. 19.4 - Prob. 3CCCh. 19.5 - Prob. 1CCCh. 19.5 - Prob. 1EQCh. 19.5 - Prob. 2EQ
Ch. 19.5 - Gene Transfer Between Bacteria CoreSKILL The gene...Ch. 19.5 - Prob. 2CCCh. 19.5 - Gene Transfer Between Bacteria Core Skill:...Ch. 19.5 - Gene Transfer Between Bacteria Concept Check: Is...Ch. 19 - Prob. 1TYCh. 19 - The characteristics of viral genomes show many...Ch. 19 - During viral infection, attachment is usually...Ch. 19 - Prob. 4TYCh. 19 - Prob. 5TYCh. 19 - Prob. 6TYCh. 19 - Prob. 7TYCh. 19 - Prob. 8TYCh. 19 - Prob. 9TYCh. 19 - Prob. 10TYCh. 19 - How are viruses similar to living cells, and how...Ch. 19 - Prob. 2CQCh. 19 - Prob. 3CQCh. 19 - Prob. 1COQCh. 19 - Prob. 2COQ
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- e. coli is commonly found in the human Microbiome. while most strains are harmless some can cause various illnesses ranging from urinary track infections to severe gastroenteritis. which of the following is a primary mechanism by which e. coli obtains its pathogenicity? A. Vertical gene transfer from parent to offspring B. Endosymbiosis with other bacteria C. Mutation in the bacterial chromosome D. Horizontal gene transfer from other Bacteria or the environmentarrow_forwardViruses are considered nonliving because Select one: A. They do not locomote. B. They can reproduce independently. C. Their nucleic acid does not code for protein. D. They are noncellular.arrow_forwardBacteria can acquire DNA directly from the environment through: please explain the answer a.Conjugation b.Transduction c.Natural transformation d.All of the abovearrow_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_forwardWhich of the following is an example of horizontal gene transfer? a. the transmission of an eye color gene from father to daughter b. the transmission of a mutant gene causing cystic fibrosis from father to daughter c. the transmission of a gene conferring pathogenicity (the ability to cause disease) from one bacterial species to another d. the transmission of a gene conferring antibiotic resistance from a mother cell to its two daughter cells e. all of the abovearrow_forwardWhat 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.arrow_forward
- Conjugation involves which of the following: a. transfer of plasmids among bacteria b. sexual reproduction of Eukaryotes c. uptake of free DNA from the environment d. integration of a virus into a chromosomearrow_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? (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_forwardWhich of the following is a structure that is not involved in conjugation in bacteria? A. sex pili B. mating bridge C. conjugative pili D. flagellumarrow_forward
- Mitochondria are thought to be the descendants of certain alpha proteobacteria. They are, however, no longer able to lead independent lives because most genes originally present in their genome have moved to the nuclear genome. Which phenomenon accounts for the movement of these genes? Group of answer choices A. recombination B. conjugation C. translation D. endosymbiosisarrow_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_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
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