Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 17, Problem 3TYK
Which of the following is not correct for bacterial conjugation?
a. Both Hfr and F+ bacteria have the ability to code for a sex pilus.
b. After an F- cell has conjugated with an F+, its plasmid holds the F+ factor.
c. The recipient cell is Hfr following conjugation.
d. In an
e. Genes on the F factor encode proteins of the sex pilus.
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Assume that there are horizontal gene transfers between two completely different bacterial species. In one case it is a plasmid that is transmitted via conjugation, in the other case it is it is a part of the bacterial chromosome that is transferred via transformation. In which of the two cases is it likely that the transferred DNA will be present? left and can function in the recipient cells? Explain the biological background to your answer
If we were to examine a strain with the F plasmid inserted into the same site of the bacterial chromosome, but in the reverse orientation:
a) What would the order of gene transfer be? Include all of the genetic markers including the amino acid and nucleic acid metabolism genes and streptomycin resistance.
b) What cell types would be able to grow on the NA vs ECM media types? Be sure to include the genotypes of the cells that would grow. Remember that NA provides all nutrients the bacteria needs + no antibiotic and HCM = minimal medium + glucose + has streptomycin antibiotic
c) Would we still be able to perform our mapping? Why or why not? (Hint: refer to part b above)
Chapter 17 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 17.1 - What are the properties of F+, F-, and Hfr cells...Ch. 17.1 - Prob. 2SBCh. 17.2 - Prob. 1SBCh. 17.2 - How does viral infection of an animal cell and a...Ch. 17.2 - Prob. 3SBCh. 17.3 - Prob. 1SBCh. 17 - Prob. 1TYKCh. 17 - Prob. 2TYKCh. 17 - Which of the following is not correct for...Ch. 17 - Prob. 4TYK
Ch. 17 - Prob. 5TYKCh. 17 - Prob. 6TYKCh. 17 - When a virus enters the lysogenic stage: a. the...Ch. 17 - An infectious material is isolated from a nerve...Ch. 17 - Prob. 9TYKCh. 17 - Prob. 10TYKCh. 17 - Prob. 11TYKCh. 17 - Discuss Concepts As a control for their...Ch. 17 - Prob. 13TYKCh. 17 - Prob. 14TYKCh. 17 - Prob. 15TYKCh. 17 - Prob. 1ITD
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- Which of the following characteristics is not true of a plasmid?a. It is a circular piece of DNA.b. It is required for normal cell function.c. It is found in bacteria.d. It can be transferred from cell to cell.arrow_forwardIn conjugation, (a) two bacterial cells of different mating types come together, and genetic material is transferred from one to another (b) a bacterial cell develops a bulge that enlarges and eventually separates from the mother cell (c) fragments of DNA released by a broken cell are taken inby another bacterial cell (d) a phage carries bacterial genes from one bacterial cell into another (e) walls develop in the cell, which then divides into several new cellsarrow_forwardWhich of the following statements is false? a. Plasmids can be exchanged between different species of bacteria. b. The blue circle represents a small chromosome. c. The blue circle is a plasmid that contains genes that confer resistance to specific antiobiotics. d. The blue circle represents a double-stranded molecule of DNA.arrow_forward
- Researchers are designing several experiments to test the ability of Salmonella bacteria to develop antibiotic resistance. A culture of Salmonella bacteria is exposed to the same concentrations (200 mg/L) of an antibiotic for four days. The table shows the number of isolated resistant bacteria over a four-day period. Which of the following statements best explains these results? A - The bacteria were not affected by the antibiotic. B - After being exposed to the antibiotic, the bacteria altered their DNA. C - A new species of bacteria emerged after the antibiotics were introduced. D - Random mutations led some bacteria to be resistant and, over time, they increased in the population.arrow_forwardChoose the one answer that fits best. The pGLO plasmid you used contains an araC gene, a GFP gene and a bla gene. If you performed the exact same experiment with a plasmid that contained a GFP gene and a bla gene, but was missing the araC gene, what would you expect to see on your four plates?   a. The positive control would not have any bacterial lawn   b. The negative control would have as many colonies as the experimental plate  c. The LB/Amp/Ara plate would have some colonies but they would not be fluorescent under UV light   d. The experimental plate would not have any colonies  e. The LB/Amp plate containing E. coli (+)pGLO would be fluorescentarrow_forwardYou want to propagate large amounts of a DNA fragment. To do this, use a plasmid vector. a) How should this plasmid vector be constructed? b) Also describe the function of the components.arrow_forward
- Antibiotic resistant genes can be located on plasmids in bacterial cells. Considering what you know about horizontal gene transfer, explain why this is a concern.arrow_forwardThe activity of restriction enzymes may produce fragments with sticky ends. Sticky ends are  a) a type of endonucleases. b) dephosphorylated CpG islands. c) unpaired nucleotides. d) double breaks with blunt ends.arrow_forwardWhich of the following is a sequence at which a restriction enzyme would cut? A) 5'AAGCAA3' B) 5'AAGCTT3' C) 5'ACAACA3' D) 5'AGAGAG3' E) 5'AGCCGT3' F) 5'AATTAAC3'arrow_forward
- Draw a diagram/figure to explain the conjugation process (e.g. use PowerPoint or draw one by hand and include a photo of it). You should include in the diagram the F- recipient, Hfr Donor and the transconjugant/recombinant recipient. Make sure to include the genes encoding for Leucine, Threonine, Thiamine and Streptomycin resistance in your diagram. How does an Hfr strain of coli transfers chromosomal DNA to an F- strain? What determines how much of the chromosomal DNA is transferred?arrow_forwardFor bacteria that are F+, Hfr, F', and F- answer the following. a. Describe the state of the F factor. b. Which of these cells are donors? Which is the recipient? c. Which of these donors can convert exconjugants to a donor state? d. Which of these donors can transfer a donor gene to exconjugants? e. Describe the results of conjugation (i.e., changes in the recipient and the exconjugant) that allow detection of the state of the F factor in a donor strain. f. Describe a "partial diploid" and how it originates.arrow_forwardA 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 bacteriumâs genome through a process called recombinationarrow_forward
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