CAMPBELL BIOLOGY IN FOCUS-W/MASTR.BIO.
3rd Edition
ISBN: 9780134875040
Author: Urry
Publisher: PEARSON
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Textbook Question
Chapter 17.2, Problem 1CC
Compare the effect on the host cell of a ly1ic (virulent) phage and a lysogenic (temperate) phage
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During the lysogenic cycle of lambda (1) phage
the phage genome is integrated in the host chromosome where it is passed on to daughter cells through binary fission.
the phage DNA is copied and accumulates in the cytoplasm. Then a trigger causes capsid proteins to be made and phages are assembled.
the product of one prophage gene is made and it activates most of the other prophage genes.
the viral genes immediately turn the host cell into a lambda-producing factory. Then the host lyses.
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phage can be "induced" as a result of DNA damage. Consequences of
induction include.
Temperate phage, e.g lambda phage; lytic cycle and transduction
Lytic T4 phage, assembly, conjugation
O Lytic phage, e.g. T4 phage; lysogenic cycle, prophage formation
Temperate phage, e.g. lambada phage, prophage formation, transformation
O T4 phage, lytic cycle, specialized trasnduction
Compare and contrast the lysogenic and lytic cycles of phage λ.
Chapter 17 Solutions
CAMPBELL BIOLOGY IN FOCUS-W/MASTR.BIO.
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- Why does phage T4 need a lysozyme-like protein in order toinfect its host, and what part of T4 enters the host cytoplasm?arrow_forwardWhich of the following statements describes the lysogenic cycle of lambda (A) phage? After infection, the viral genes immediately turn the host cell into a lambda-producing factory, and the host cell then lyses. Most of the prophage genes are activated by the product of a particular prophage gene. The phage DNA is incorporated into the bacteria DNA The phage DNA is copied and exits the cell as a phage. The phage DNA get destructed by the host bacteria DNAarrow_forwardBriefly describe the differences between the lytic cycle of virulent phages and the lysogenic cycle of temperate phages.arrow_forward
- Bacteriophage T4 lacks its own RNA polymerase.How do T4 genes get expressed or converted to mRNA?What host barriers must be broken before release ofvirions from the host cell?arrow_forwardWhat is the difference between the lytic and lysogenic cycle of bacteriophages? In the lysogenic cycle, the phage DNA integrates itself into the host genome after penetration, and continues to biosynthesis when conditions change The host cell is not killed in the lysogenic cycle The lytic cycle occurs in the nucleus, while the lysogenic cycle occurs in the cytoplasm In the lysogenic cycle, penetration is achieved through phagocytosisarrow_forwardWhat advantages might a phage gain by being capable of lysogeny?arrow_forward
- Lambda phage çan facilitate bacterial chemosomal DNA transfer through the process of specialized transduction / generalized transduction (copy and paste the correct answer) A by transferring specific bacterial DNA / bacterial DNA at random (copy and paste the correct answer) A from a donor cell / recipient cell (copy and paste the correct answer) A to a donor cell / recipient cell (copy and paste the correct answer).arrow_forwardIndicate 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 botharrow_forwardHost DNA is digested into small pieces, which are occasionally assembled with phage proteins, creating a phage with bacterial chromosomal DNA. If the breakage of the chromosomal DNA is not random (i.e., it is more likely tobreak at certain spots as opposed to other spots), how might suchnonrandom breakage affect cotransduction frequency?arrow_forward
- Which of the processes of information transfer illustrated in Figure are required for the T2 phage reproduction illustrated in Figure ?arrow_forwardYou are studying your favorite (hypothetical) bacteriophage named M277. It infects E. coli and stays dormant within the bacterial cell. How does a phage become dormant within a cell? Generally, describe the steps of infection by phage in this scenarioarrow_forwardThis gene is responsible for making the protein that catalyzes the recombination of the phage genome into the host bacterial chromosome is: excise integrase attP attBarrow_forward
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