Microbiology: An Evolving Science (Fourth Edition)
4th Edition
ISBN: 9780393615098
Author: John W. Foster, Joan L. Slonczewski
Publisher: W. W. Norton & Company
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Chapter 20.5, Problem 1TQ
Summary Introduction
To review:
The comparison of the process of conjugation in bacteria and ciliates.
Introduction:
Conjugation is the genetic substance transfer between bacterial cells by the cell to cell direct communication. It can also transfer the genetic material amongst the two cells through a bridge-like interaction. It cannot be called sexual reproduction as the production of any new organisms does not take place during this reaction.
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Briefly explain the process of bacterial conjugation, and explain how it is different from conjugation in humans.
explain why bacterial conjugation should not be considered sexual reproduction
Differentiate horizontal and vertical gene transfer. Compare the mechanisms of genetic recombination in bacteria (define/contrast: transformation, conjugation, and transduction). Characterize the 4 different cell types involved in conjugation.
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Microbiology: An Evolving Science (Fourth Edition)
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- Why is it favorable for protozoa to replicate with schizogony versus using simple mitosis? what are the different scenarios that can occur with regards to bacterial growth within a thioglycolate tube? Explain why certain bacteria require one classification versus a different classification. A botanist has been using betaproteobacteria to grow his herb garden, because betaproteobacteria require little nutrients to grow. His garden does not grow successfully, so he comes to you for help to develop the herb garden. Which class of gram negative bacteria would you suggest and why? Why was the botanist’s original idea not going to work?arrow_forwardPlease explain the steps of horizontal gene transfer or conjugation.arrow_forwardCompare and contrast the three forms of gene transfer—conjugation, transformation, and transduction—in bacteria.arrow_forward
- Which of the following is a bacterial genetic recombination mechanism that happens with the aid of bacteriophages. * O meiosis conjugation transduction binary fission O transformation tomperate phages*arrow_forwardWhich of the statements is TRUE about conjugation? a) Plasmid DNA is transferred from a donor (F+) cell b) It may only be performed by competent cells c) DNA is always integrated into recipient chromosome d) It may be specialized or generalizedarrow_forwardDescribe the four phases of bacterial cell division. Where would horizontal gene transfer occur? Where would sporogenesis occur? If antibiotics generally target cells which are growing and dividing as fast as they can, when would antibiotics be most effective? If a culture had 4 cells to begin with and has a generation time of 60 minutes, how long would it take to get 1,048,576 cells?arrow_forward
- Mention four reason why drosophilla was chossen by morgan for his experiment in genetics?arrow_forwardIn your own words, discuss the life cycle of E. histolytica.arrow_forwardBacterial conjugation has medical consequences. For example, certain plasmids contain genes that code for toxins. The causative agent of a deadly form of food poisoning, E. coli 0157, synthesizes a toxin that causes massive bloody diarrhea and kidney failure. This toxin is now believed to have originated in Shigella, another bacterium that causes dysentery. Similarly, the growing problem of antibiotic resistance is partly attributable to the spread of antibioticresistant genes among bacterial populations. Antibiotic resistance develops because antibiotics are overused in medical practice and in livestock feeds. Suggest a mechanism by which this extensive use promotes antibiotic resistance.arrow_forward
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genetic recombination strategies of bacteria CONJUGATION, TRANSDUCTION AND TRANSFORMATION; Author: Scientist Cindy;https://www.youtube.com/watch?v=_Va8FZJEl9A;License: Standard youtube license