Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 21, Problem 3VCQ
Figure 21.10 Which of the following statements is false?
- In the lytic cycle, new phages are produced and released into the environment.
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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
You 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 scenario
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
Chapter 21 Solutions
Biology 2e
Ch. 21 - Figure 21.5 Which of the following statements...Ch. 21 - Figure 21.8 Influenza virus is packaged in a viral...Ch. 21 - Figure 21.10 Which of the following statements is...Ch. 21 - Which statement is true? A virion contains DNA and...Ch. 21 - The viral______play(s) a role in attaching a...Ch. 21 - Viruses. all have a round shape cannot have a long...Ch. 21 - The observation that the bacteria genus Chlamydia...Ch. 21 - A scientist discovers a new virus with a linear,...Ch. 21 - Which statement is not true of viral replication?...Ch. 21 - Which statement is true of viral replication? In...
Ch. 21 - Which statement is true of reverse transcriptase?...Ch. 21 - Oncogenic virus cores can be. RNA DNA neither RNA...Ch. 21 - Which is true of DNA viruses? They use the host...Ch. 21 - A bacteriophage can infect the lungs viruses...Ch. 21 - People with the CCR5?32 mutation of a T-cell...Ch. 21 - An apple grower notices that several of his apple...Ch. 21 - Which of the following is NOT used to treat active...Ch. 21 - Vaccines. are similar to viroids are only needed...Ch. 21 - A patient presents at the clinic with an acute...Ch. 21 - Which of the following is not associated with...Ch. 21 - Which statement is true of viroids? They are...Ch. 21 - The first electron micrograph of a virus (tobacco...Ch. 21 - Varicella-zoster virus is a double-stranded DNA...Ch. 21 - Classify the Rabies virus (a rhabdovirus family...Ch. 21 - Why can’t dogs catch the measles?Ch. 21 - One of the first and most important targets for...Ch. 21 - In this section, you were introduced to different...Ch. 21 - Although plant viruses cannot infect humans, what...Ch. 21 - A bacteriophage with a lytic life cycle develops a...Ch. 21 - Why is immunization after being bitten by a rabid...Ch. 21 - The vaccine Gardasil that targets human papilloma...Ch. 21 - Prions are responsible for variant Creutzfeldt...Ch. 21 - How are viroids like viruses?Ch. 21 - A botanist notices that a tomato plant looks...
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- This 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_forwardIn Figure 5-25, can you point to any phage progeny thatcould transducearrow_forwardThe lytic cycle of a bacteriophage can be characterized by A large number of phages are released at a time. The virus-host relationship usually lasts for generations. The viral genome replicates without destroying the host. Viral DNA is incorporated into the host genome.arrow_forward
- An antimicrobial drug binds to the HIV reverse transcriptase enzyme, preventing it from working. Which of the following is true of this drug? It would inhibit early replication steps of some viruses, but not affect normal eukaryotic cell activity. It would directly interfere with translation of some viral proteins and some eukaryotic proteins. It would block assembly/maturation steps of some viruses, and interfere with translation in eukaryotic cells. It would interfere with release of newly formed viruses from a host cell, but not affect eukaryotic cells. It would interfere with protein synthesis in bacteria, but not affect eukaryotic ribosomes. It would interfere with mRNA transcription in bacteria and viruses, but not affect eukaryotic transcription.arrow_forwardPut in the correct order the following steps of the lytic cycle in phage replication: 1. Phage components are assembled into mature virions 2. Phage attach to a host cell 3. The bacterial cell lyses and many new infectious virions are released 4. Phage DNA is injected into the bacterial cell 5. Copies of phage genome and phage proteins are made, the host DNA is degradedarrow_forwardIn the lytic cycle of a bacteriophage the host membrane ruptures, releasing many phages. the host sequesters viral particles in the lysosome. viral DNA incorporates into the host genome. the viral genome replicates without destroying the host.arrow_forward
- Which cycle produces new phage particles?arrow_forwardWhich cycle produces new phage particles?arrow_forwardMost phages that use DNA to propagate work by hijacking host bacterial machinery including RNA Polymerase. Scientists found that treatment of jumbo bacteriophage PhiKZ with Rifampicin did not stop the phage from propagating. What is allowing for the survival of this phage?arrow_forward
- Which 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_forwardSome phages have a modified replication cycle in which infected host cells continue to grow and reproduce normally. In this cycle the phage DNA incorporates into the bacterial DNA. The integrated virus is called a ________________. And the cycle is known a ____________________or ________________.arrow_forwardWhich part of a phage is involved in adsorption? Tail Genetic material Head Tail fibersarrow_forward
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