BIOLOGY
5th Edition
ISBN: 9781265202859
Author: BROOKER
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Chapter 27, Problem 9TY
Summary Introduction
Introduction: Members of archaea and bacteria belong to a group of most primitive organisms found on earth and are prokaryotic in nature. These members are cosmopolitan and are found in almost all possible habitats.
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Explain the importance of the following features in conjugating donor bacteria:
a. the origin of transfer
b. the conjugation pilus
c. homologous recombination
d. the relaxosome
e. relaxase
f. T strand DNA
g. pillin protein
A transducing particle injects all of the DNA that it contains into a bacterial cell. Which of the following are TRUE? A. The bacterium becomes Hfr B. The bacterium becomes F+ C. The bacterium immediately acquires new functions as the injected DNA is rapidly transcribed and translated into mRNA and proteins D. This injected DNA can integrate into the bacterium’s genome through a process called recombination
Bacteria can acquire DNA directly from the environment through:
please explain the answer
a.Conjugation
b.Transduction
c.Natural transformation
d.All of the above
Chapter 27 Solutions
BIOLOGY
Ch. 27.2 - Core Skill: Connections Look ahead to Section...Ch. 27.2 - Prob. 2CSCh. 27.2 - Structure and Movement Concept Check: Does the...Ch. 27.2 - Prob. 3CSCh. 27.3 - Prob. 1CCCh. 27.5 - Prob. 1EQCh. 27.5 - Prob. 2EQCh. 27 - Which of the following features is common to...Ch. 27 - The bacterial phylum whose members typically...Ch. 27 - Gram-staining is a procedure that microbiologists...
Ch. 27 - Place the following steps in the correct order,...Ch. 27 - What ecological role do cyanobacteria play? a....Ch. 27 - Prob. 6TYCh. 27 - Prob. 7TYCh. 27 - Prob. 8TYCh. 27 - Prob. 9TYCh. 27 - Prob. 10TYCh. 27 - Prob. 1CQCh. 27 - Prob. 2CQCh. 27 - Prob. 3CQCh. 27 - Prob. 1COQCh. 27 - Prob. 2COQ
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- The difference between transformation and conjugation in bacteria consists of the fact that: a. only transformation involves the presence of a plasmid b. only conjugation involves the presence of a plasmid c. only conjugation involves the presencce of a sex pilus d. both answers b and c are correct e. none of the above answers arre correctarrow_forwardWhich process of DNA transfer in bacteria requires a virus? a. Conjugation b. Transduction c. Transformation d. All of the abovearrow_forwardWhich of the following is defined as transformation? A. Transfer of genetic information via a plasmid B. Virus infects a host and deposits genetic material C. Free floating DNA is uptaken D. Transfer of genetic information from one bacterium to another 5.arrow_forward
- Which of the following is NOT a method by which bacteria can be resistant to antibiotics? Select one: a. Utilise an alternate pathway of gene expression that is not targeted by the antibiotic. b. Alter the binding site of the antibiotic, to either prevent it binding, or remove it from the site. c. Production of enzymes that bind to and break down the specific antibiotic. d. Production of a cell membrane pump that translocates antibiotics outside the cell. A potential side effect of antibiotic use is a secondary bacterial or fungal infection, usually associated with regions like the skin, upper-respiratory tract or genitalia. What is the most likely reason for the formation of these secondary infections? Select one: a. Antibiotics do not work on viruses, so they are able to establish infections in these locations. b. Organisms that are antibiotic resistant are usually more virulent, meaning they can survive and cause infection. c. The antibiotic kills off normal flora, providing an…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_forwardA form of genetic transfer that involves the uptake of a fragment of DNA from the environment is calleda. conjugation.b. transduction.c. transformation.d. all of the above.arrow_forward
- For 'transformation' to occur in bacterial cells, certain conditions must be satisfied. Check all the conditions that apply--Select one or more: a.low nutrient availability b.high cell density c.presence of different bacterial species/strains d.low cell density e.presence of antibioticsarrow_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_forwardIn lytic cycle of bacteriophage replication a. bacteriophage transfers bacterial DNA b. viral DNA masters the bacterial cell and the bacterial genome is degraded c. bacteria take up double stranded DNA from the environment d. a bacteriophage genome is integrated into the bacterial genome e. sex pilus is involved а. а b. b С. С d. d е. еarrow_forward
- 5) Pathogenic bacteria such as Mycobacterium tubercuosis tend to become resistant to antibiotics used to treat them over time. This resistance arises because a. individual bacteria undergo mutations when exposed to an antibiotic b. individual bacteria are able to adapt to the presence of an antibiotic c. individual bacteria become tolerant to an antibiotic over time d. some individual bacteria have mutations that make them resistant when the drug is first appliedarrow_forwardWithin 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_forwardConjugation 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_forward
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