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 6.6, Problem 1TQ
Summary Introduction
To review :
The curve in bacteriophage reproduction and cellular reproduction.
Introduction:
Bacteriophage reproduces by infecting a host cell. The lifecycle of the phage involves the steps that involve the infection process. Cellular reproduction curve is exponential as the cells increase in a geometric manner rather than linear. This is because the cells reproduce rapidly as soon as they get the nutrients and the optimum environmental conditions they need.
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If a single bacteriophage infects one E. coli cell present on a lawn of bacteria and, upon lysis, yields 185 viable viruses, how many phages will exist in a single plaque if 5 more lytic cycles occur?
Express your answer using three significant figures (example: 1.11×10^3).
Which statement is true regarding a bacteriophage in the lysogenic cycle?
111
A) O The bacteriophage can exit the lysogenic state depending on the condition of host cell
B) O While in this cycle, it would cause no harm to the host cell.
O OAs the host cell divides, the bacteriophage genome will be present in all of the host cell's progeny.
|D) OIt would become a prophage.
E) O All are true statements.
What is the term used to describe the genome of a bacterial cell that has been
infected by a phage utilizing lysogeny?
O 1) nucleocapsid
O 2) prophpage
O 3) provirus
O 4) lysogenome
O 5) chromatid
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Microbiology: An Evolving Science (Fourth Edition)
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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
- What does a bacteriophage accomplish with lysogeny? O 1) it allows the bacteriophage to destroy the host cell's DNA. 2) it enables the bacteriophage to take over the cell. O 3) it speeds up the viral infection cycle. 4) it allows the bacteriophage to infect cells it would not normally infect. O 5) the genetic material of the bacteriophage can be passed on to future generations of infected cells.arrow_forwardWhy 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_forwardIn bacteria, acquisition of an F prime factor could result in the formation of a partial diploid. Theoretically, what other processes could result in creating a partial diploid? A) O transformation B) O conjugation C) O specialized transduction D) O generalized transduction D) O all of the abovearrow_forward
- Which of the statements about bacteriophage is FALSE: a) specialized transduction is a low frequency event b) may accidently package host DNA into a phage particle c) may perform specialized transduction d) only have a lytic life cyclearrow_forwardWhich of the following statements is TRUE? Log cell numbers 1 Time a) The generation time for bacteria is usually the same from species to species. b) In the lag phase, cell death exceeds cell division. c) Bacteria typically divide by budding, producing a daughter cell that is smaller than the parental cell. d) In the death phase, bacterial growth stops because of nutrient depletion and waste accumulation.arrow_forwardIn order to determine the genetic material of a T2 phage, Alfred Hershey and Martha Chase conducted experiments using T2 phages that infected bacteria. In one treatment, they grew phages with radioactive sulfur. In another treatment, they grew phages with radioactive phosphorous. They allowed both types of phages to infect bacterial cells. After infection, they found that only bacteria infected with phages grown with radioactive phosphorous showed any radioactivity. Why did they use radioactive sulfur and phosphorous for this experiment? * O Sulfur is part of the DNA molecule but not part of a protein molecule. Sulfur and phosphorous are some of the most reactive molecules and are easily traced. Sulfur and phosphorous are able to survive the centrifuge, a crucial component of the experiment. O Phosphorous is part of the DNA molecule but not part of a protein molecule.arrow_forward
- If a single bacteriophage infects one E. coli cell present on a lawn of bacteria and, upon lysis, yields 200 viable viruses, how many phages will exist in a single plaque if three more lytic cycles occur?arrow_forwardWhich process listed below allows genetic material to be transferred from a virus-like particle that lacks genes for its own replication? A) Conjugation of an F+ plasmid B) Gene transfer through a gene transfer agent C) Transduction by a dsDNA phage Mu D) Transformation of a linear piece of DNAarrow_forwardWhich of the following is inconsistent with the central dogma? a) An RNA molecule that can self-replicate O b) A chromosome that is duplicated before cell division Oc) A protein that converts its own amino acid sequence into a DNA sequence O d) A retrovirus (e.g. HIV) that transcribes its RNA genome into DNA inside its host O e) A gene being translated into a proteinarrow_forward
- Which of the following statements is not applicable to conjugation? A) OF factors are transferrable plasmids passed from one cell to another during conjugation. B) O During conjugation, rolling circle replication transfers an F factor from an F+ cell to an F- cell. ) O An F factor acquired during conjugation will automatically be integrated into the recipient's chromosome. D) O Conjugation requires physical contact between cells via the formation of a sex pilus. E) O An Hfr strain is capable of transferring a portion of the chromosome during conjugation.arrow_forwardWhy are prokaryotes able to replicate so much more quickly than eukaryotes? (Hint: What cellular components must be copied before a cell splits in two?) Why is this difference in replication rate an important part of our vulnerability to bacterial pathogens?arrow_forwardWhich of the following terms describes bacteriophage DNA that has become integrated into the host cell chromosome? A) plasmid B) impolite phage C) transposon D) prophagearrow_forward
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