Biology: Life on Earth
10th Edition
ISBN: 9780321729712
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: Benjamin Cummings
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Textbook Question
Chapter 19, Problem 8FTB
A virus consists of a molecule of ____or _____ surrounded by a(n) _______ coat. A virus cannot reproduce unless it enters a(n)_________cell.
A virus that infects bacteria is known as a(n) ____.
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A virus consists of a molecule of________ or_______surrounded by a(n)___________ coat. A virus cannot reproduce unless it enters a(n)_________ cell. A virus that infects bacteria is known as a(n) ________.
To be considered a virus, a virus MUST…
_____be able to insert (recombine) its genes into the main chromosome (s) of the host
_____only replicate inside of a host cytoplasm
_____be a part of the Universal Tree of Life
_____contain enzymes
_____respire or ferment
Which of the following highly contagious viruses is a single-stranded ribonucleic acid (RNA) virus with a helical capsid and envelope and is transmitted by coming in contact with respiratory secretions?
"This is a highly contagious respiratory illness transmitted when an infected person coughs or sneezes virus particles into the air," the health department said in a written statement. "It's so contagious that if one person is sick and spreading measles, nine out of 10 people around them who aren't immune will get it, too."
Group of answer choices
a. Measles
b. Parvovirus
c. Coxsackie virus A
d. Rhinovirus
Chapter 19 Solutions
Biology: Life on Earth
Ch. 19 - _______have peptidoglycan in their _____, but____...Ch. 19 - Fill-in-the-Blank The size of prokaryotic cells...Ch. 19 - 3. Many prokaryotes use _____ to move about. Some...Ch. 19 - _____ bacteria inhabit environments that lack...Ch. 19 - 5. Prokaryotes reproduce by _____and may sometimes...Ch. 19 - 6. The plant nutrient ammonium is produced by___...Ch. 19 - Fill-in-the-Blank Diseases caused by pathogenic...Ch. 19 - A virus consists of a molecule of ____or _____...Ch. 19 - Describe some of the ways in which prokaryotes...Ch. 19 - What are nitrogen-fixing bacteria, and what role...
Ch. 19 - Describe some of the extreme environments in which...Ch. 19 - Prob. 4RQCh. 19 - What is conjugation? What role do plasmids play in...Ch. 19 - 6. Why are prokaryotes especially useful in...Ch. 19 - Describe the structure of a typical virus. How do...Ch. 19 - Describe some examples of how prokaryotes are...Ch. 19 - How do archaea and bacteria differ? How do...Ch. 19 - Prob. 1ACCh. 19 - Before the discovery of prions, many (perhaps...Ch. 19 - Argue for and against the statement "Viruses are...
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- The genome of a virus consists of (a) DNA (b) RNA (c) prions (d) DNA and RNA (e) DNA or RNAarrow_forwardFigure 17.6 Influenza virus is packaged in a viral envelope, which fuses with the plasma membrane. This way, the virus can exit the host cell without killing it. What advantage does the virus gain by keeping the host cell alive?arrow_forwardFigure 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_forward
- Which 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_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_forwardIs a Virus considered living or non-living (Justify the answer)? Give one example of a virus.arrow_forward
- Which of the following statements is TRUE concerning viral envelopes? Only viruses with envelopes have their contents enclosed by a layer containing lipids Only viruses without envelopes interact with receptor proteins on the surface of the host cell. Only viruses without envelopes can release their genetic material into the cytoplasm of the host. Only viruses with envelopes package their genetic material by engulfing it.arrow_forwardSelect all the following statements that are TRUE regarding viruses: □ All viruses are potentially dangerous to humans because any virus can infect any host. □ Viruses are fastidious pathogens that require complex growth media. □ Viruses are noncellular particles that take over the metabolism of a cell to generate more virus particles. □ Viruses are genomes made of RNA and DNA that lack many protein. □ Viruses can infect all other known life forms on earth, from Archaea to humans.arrow_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
- How 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_forwardYou are arguing with one of your classmates. They say viruses are living, you say they are not. What argument would you give that they are non-living entities? – Think about the structure and function of virusesarrow_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_forward
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What Is A Virus ? ; Author: Peekaboo Kidz;https://www.youtube.com/watch?v=YS7vsBgWszI;License: Standard YouTube License, CC-BY