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 13RQ
Which is true of DNA viruses?
- They use the host cell's machinery to produce new copies of their genome
- They all have envelopes
- They are the only kind of viruses that can cause cancer
- They are not important plant pathogens.
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Check out a sample textbook solutionStudents have asked these similar questions
The genetic material of viruses can come in which
form?
O Double stranded DNA
Single stranded DNA
Single stranded RNA
Double stranded RNA
All of the above
How do viruses recognize their hosts to infect them?
They bind receptors on the host cell surface
They read the host cell DNA
Which one of the following is not true for virus, obligate intracellular parasites?
Viruses cannot generate energy outside of cells
Viruses cannot synthesize proteins outside of cells
Enveloped viruses require host cell membrane to obtain their envelopes
Viruses must degrade host cell DNA in order to obtain nucleotides
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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- Figure 17.5 Which of the following statements about virus structure is true? a. All viruses are encased in a viral membrane. b. The capsomere is made up of small protein subunits called capsids. c. DNA is the genetic material in all viruses. d. Glycoproteins help the virus attach to the host cell.arrow_forwardThe genome of a virus consists of (a) DNA (b) RNA (c) prions (d) DNA and RNA (e) DNA or RNAarrow_forwardArrange the following list into the correct sequence for part of the cycle of a retrovirus: 1. dsDNA integrated into host DNA 2.viral proteins synthesized on host ribosomes 3. viral DNA uses host enzymes to transcribe viral RNA 4. reverse transcriptase catalyzes synthesis of ssDNA 5. synthesis of second DNA strand (a) 5, 2, 1, 3, 4 (b) 5, 2, 3, 4, 1 (c) 4, 5, 1, 3, 2 (d) 4, 1, 2, 3, 5 (e) 2, 1, 3, 4, 5arrow_forward
- Figure 21.5 Which of the following statements about virus structure is true? All viruses are encased in a viral membrane The capsomere is made up of small protein subunits called capsids. DNA is the genetic material in all viruses. Glycoproteins help the virus attach to the host cell.arrow_forwardPick two that are true. When it comes to infecting eukaryotic cells, viruses are a little different because: The viruses lyse themselves more quickly with the aid of bacterial genomes The virion always remains outside the cell envelope The entire capsid can enter the host cell The virus can hide out in special membrane bound areas inside the cellarrow_forwardWhich of the following is a similarity between viruses of bacteria (bacteriophages) and viruses of algae? These viruses will enter host cells by membrane fusion. They infect host cells by injecting nucleic acid (i.e., capsid does not enter cell) After replication in a host cell, the newly-assembled viruses will exit the cell by budding. These viruses are taken into host cells by phagocytosis.arrow_forward
- Prions are tiny circular molecules of RNA that can infect plants mobile segments of DNA viral DNA that attaches itself to the host genome and causes disease misfolded versions of normal proteins that can cause diseasearrow_forwardProvide a narrative description of this image.arrow_forwardWhat happens during the 'incubation period'? The virus is cleared from the body by the immune system This period commonly lasts for a few days Virus replication happens at an intracellular level This period commonly lasts for a few hoursarrow_forward
- Which of the following is NOT a characteristic of viruses? they are smaller than prokaryotic cells Othey are acellular (no cellular structure) they are obligatory parasites. Othey are visible with a light microscope Savedarrow_forwardWhat allows the membrane of the HIV and the membrane of the host to fuse? The virus capsid dissolves in the phospholipid bilayer of the host cell membrane The virus contacts proteins on the cell membrane of the host, and then the viral proteins undergo conformational changes The virus docks at a pore, which then pulls the virus into the cell membrane due to molecular attractionsarrow_forwardHow common is ABV in the USA? In the United States, over half of adults have been infected with ABV by age 40. Once ABV is in a person's body, it stays there for life and can reactivate. Match terms with descriptions based on the text above. You can use an answer more than once or not at all. "Over half of adults have been infected with ABV by age 40." ABV could belong to this group of viruses: A. Human Papilloma Viruses B. Incidence of ABV C. Herpesviruses D. Prevalence of ABV by age 40arrow_forward
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