Which is the last stage of phage replication allowed to proceed before a temperate phage enters the lysogenic cycle? Genome delivery/injection of genetic material into the cell Release/lysis Assembly Macromolecular synthesis/replication Adsorption/phage attachment

Which is the last stage of phage replication allowed to proceed before a temperate phage enters the lysogenic cycle? Genome delivery/injection of genetic material into the cell Release/lysis Assembly Macromolecular synthesis/replication Adsorption/phage attachment

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter21: Viruses

Section: Chapter Questions

Problem 3VCQ: Figure 21.10 Which of the following statements is false? In the lytic cycle, new phages are produced...

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Concept explainers

Genetic Recombination

Recombination is crucial to this process because it allows genes to be reassorted into diverse combinations. Genetic recombination is the process of combining genetic components from two different origins into a single unit. In prokaryotes, genetic recombination takes place by the unilateral transfer of deoxyribonucleic acid. It includes transduction, transformation, and conjugation. The genetic exchange occurring between homologous deoxyribonucleic acid sequences (DNA) from two different sources is termed general recombination. For this to happen, an identical sequence of the two recombining molecules is required. The process of genetic exchange which occurs in eukaryotes during sexual reproduction such as meiosis is an example of this type of genetic recombination.

Microbial Genetics

Genes are the functional units of heredity. They transfer characteristic information from parents to the offspring.

Question

Which is the last stage of phage replication allowed to proceed before a temperate phage enters the lysogenic cycle?
Genome delivery/injection of genetic material into the cell
Release/lysis
Assembly
Macromolecular synthesis/replication
Adsorption/phage attachment

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Which step(s) occur in the lysogenic replication cycle of temperate phage but does not occur in the lytic replication cycle? O adsorption O biosynthesis O assembly O release O formation of prophage and lysogen
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
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. 0000
Figure 21.10 Which of the following statements is false? In the lytic cycle, new phages are produced and released into the environment. In the lysogenic cycle, phage DNA is incorporated into the host genome. An environmental stressor can cause the phage to initiate the lysogenic cycle. Cell lysis only occurs in the lytic cycle.
Which 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 DNA
Classify each statement as true of generalized transduction or specialized transduction. Generalized transduction Specialized transduction Answer Bank Genes transfer from random sites in the bacterial chromosome. This utilizes lysogenic phages. Genes that transfer depend on the prophage insertion site. This utilizes lytic phages. Phage inserts itself at a specific site in the bacterial chromosome. This requires accidental packaging of bacterial DNA in viral capsids.
A phage that reproduces slowly, produces relatively few phage particles, and only undergoes the lytic life cycle most likely will produce a plaque that is: Smaller and clear Smaller and turbid/hazy Larger and turbid/hazy Larger and clear
A phage that reproduces slowly, produces relatively few phage particles, and only undergoes the lytic life cycle most likely will produce a plaque that is: OSmaller and turbid/hazy Smaller and clear Larger and turbid/hazy Larger and clear
The figure depicts five stages of the lytic cycle. ********* Select the statement that describes stage 3 of the lytic cycle, as shown in the diagram. The host cell synthesizes cellular proteins to prepare for lysis. The host cell incorporates phage DNA into its own genome. The host cell replicates the phage DNA. O The host cell synthesizes proteins that degrade phage DNA.
What 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 phagocytosis
Which of the following is true of Generalized transduction? O creates defective virions that are missing the entire phage genome phage and host DNA are both packed in the capsid by error Cha type of Hirgone transfer Frequency is I in 10¹ O occurs during the lysogenic cycle
In which of the four processes shown can material from a bacterial genome be transferred from one cell to another? Which are forms of horizontal transmission? Place the answer(s) in the cell highlighting that process. Partial genome transfer by DNA uptake Transformation Answer Bank material from a bacterial genome horizontal gene transfer Conjugation Plasmids Conjugation Genome Plasmid transfer during conjugation Partial genome transfer during conjugation Virus Transduction Transfer as part of viral genome