BIOLOGY CONNECT ACCESS CARD
12th Edition
ISBN: 9781264037452
Author: Raven
Publisher: MCG
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Chapter 26, Problem 6A
Summary Introduction
Introduction: Any groups of viruses that infect and replicate within the bacteria is referred to as a bacteriophage. They inject their own genetic material into the bacterial cells and use the biological machinery of the bacteria for their reproduction.
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In which bacteriophage life cycle does the phage DNA become incorporated into the bacterial chromosome?
a. Lytic
b. Lysogenic
c. Both lytic and lysogenic
d. Neither lytic nor lysogenic
The structure of a prodrug used for treating people with HIV virus (human immunodeficiency virus) and AIDS is shown below. This molecule is a precursor of a protease inhibitor that competitively inhibits HIV protease due to its resemblance to the proteolytic site of the enzyme. Which process in the viral life cycle does this inhibitor target directly ?
Group of answer choices
a. viral protein processing for making new viruses
b. viral mRNA synthesis
c. viral DNA integration into the host cell DNA
d. viral DNA synthesis
Indicate whether each statement applies to the lytic or lysogenic cycle of phage A, or to both.
1. The host cell is lysed. (Click to select) v
2. The genetic material of the phage is copied. (Click to select) v
3. The genetic material of the phage is integrated into the bacterium's chromosome. (Click to select) v
4. Two ends of the phage DNA become covalently attached to one another. (Click to select) v
5. The integrase gene is turned on.: (Click to select) v
(Click to select)
lytic
lysogenic
both
Chapter 26 Solutions
BIOLOGY CONNECT ACCESS CARD
Ch. 26.1 - Prob. 1LOCh. 26.1 - Prob. 2LOCh. 26.2 - Prob. 1LOCh. 26.2 - Prob. 2LOCh. 26.3 - Prob. 1LOCh. 26.3 - Describe how viruses can contribute DNA to their...Ch. 26.4 - Describe the differences between acute and...Ch. 26.4 - Prob. 2LOCh. 26.4 - Prob. 3LOCh. 26.5 - Prob. 1LO
Ch. 26 - Prob. 1UCh. 26 - Prob. 2UCh. 26 - Prob. 3UCh. 26 - Prob. 4UCh. 26 - Why is a drug that blocks HIV binding to one of...Ch. 26 - Prob. 6UCh. 26 - Prob. 7UCh. 26 - Prob. 1ACh. 26 - Prob. 2ACh. 26 - Prob. 3ACh. 26 - Prob. 4ACh. 26 - Prob. 5ACh. 26 - Prob. 6ACh. 26 - Prob. 7ACh. 26 - E. coli lysogens derived from infection by phage ...Ch. 26 - Prob. 2SCh. 26 - Prob. 3SCh. 26 - Prob. 4SCh. 26 - Prob. 5S
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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 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_forwardIf the HIV did not have a reverse transcriptase enzyme, then which of the following would apply? Select one: a. The virus can make use of the reverse transcriptase enzyme from the host cell to convert its RNA into DNA b. Viral particles will be produced without reverse transcriptase enzyme since the original HIV is an RNA virus and needs to assemble RNA ant coat proteins together c. The virus will manufacture its proteins from its RNA using translation and ribosomes from host cell d. Provirus will not be formed and assembly of viral particles will never occur e. The virus will not be able to recognise the host cell and therefore entry into the cell is blockedarrow_forwardWhich statement describes the difference between a lytic and lysogenic phage cycle? In a lytic cycle, new phage particles will be produced; in a lysogenic cycle, the phage DNA is passed to new cells but does not produce phage particles. In a lytic cycle, the host cell does not die; in a lysogenic cycle, the host is killed. In a lytic cycle, the phage DNA enters the host cell; in a lysogenic cycle, the phage DNA remains on the exterior of the host cell. In a lytic cycle, the phage DNA incorporates into the host genome; in a lysogenic cycle, the phage DNA does not incorporate into the host genome.arrow_forward
- In an experiment, scientists grew bacteriophages in a culture with radioactive phosphorus (32P). The phages were then allowed to infect E. coli. a. The phages were then allowed to infect E. coli. Where was the 32P found after mixing with the E. coli?arrow_forwardThe figure above shows a schematic of genes and transcription control elements from phage λ. Use this figure as an aid to help you describe the molecular events involved in: a) The establishment of lysogeny b) The establishment of a lytic life cyclearrow_forwardBriefly describe the two approaches a bacteriophagecan take to trigger an infection once inside its host cell.arrow_forward
- When various strains of λ phage are seeded on a lawn of E. coli, they can form clear or turbid plaques. (b) For mutant λ phages that can only form clear plaques, give two different types of mutation in the phage that can explain the clear plaque phenotype.arrow_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_forwardTransformation of mammalian cells with viruses and obtaining mammalian cells harboring the virus is a method used to maintain the virus of interest. During this process what are the plaques observed? A. Clear areas in a layer of cultured cells degenerated and lysed due to virus infection. B. Stained areas in a cell culture indicating cells infected by a virus. C. Virus colonies on agar. D. Bacterial colonies on agararrow_forward
- Define the following terms: a. lytic cycle b. prophage c. transduction d. lysogeny e. nuclocapsidarrow_forwardOne of the reasons why phage therapy has not been applied widely is that bacteria can become resistant to bacteriophages as well, through mutations in genes encoding for specific proteins. What would be a protein in the bacterial cell that, if mutated, would make that cell resistant to phage infection?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
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