Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Chapter 21, Problem 15RQ
People with the CCR5?32 mutation of a T-cell surface protein can be exposed to some strains of
HIV-1 without becoming sick. What step of the virus life cycle is likely to be inhibited with this mutation?
- Release
- Reverse transcription
- Uncoating
- Attachment
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People with the CCR5Δ32 mutation of a T-cell surface protein can be exposed to some strains of HIV-1 without becoming sick. What step of the virus life cycle is likely to be inhibited with this mutation? a. Release b. Reverse transcription c. Uncoating d. Attachment
What is the most common way for a virus to kill a cell?
Dissolves the cellular membrane
Fragments cellular DNA
Induces apoptosis via caspases
Totally blocks cellular transcription
Which is not a virus encoded protein that participates in viral DNA synthesis?
Group of answer choices
Rb protein
Origin binding proteins
Exonucleases
DNA polymerase and accessory proteins
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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- Viral DNA synthesis cannot take place in a resting cell. How is this problem solved? Which one is correct? Early viral proteins like T antigen and E1A inactivate Rb protein Viral late promoters are activated by DNA replication DNA polymerase is encoded in the viral genome Viral DNA genomes have multiple origins of replicationarrow_forwardAntibody diversity is a consequence of differential regulation of antibody gene expression under different circumstances. the huge number of antibody genes. shuffling of antibody genes into different combinations during B cell development. the many types of viruses that exist in nature.arrow_forward1. Antibodies are chemicals that the immune system make to attack viruses and bacteria. Each type of antibody... a. attacks only a very specific target. For example, there is one antibody that attacks the mumps virus and no-other virus. b. attacks a wide variety of targets. For example, there is one antibody that can attack any virus.arrow_forward
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