Describe how each of the following viruses gets into and out of its host cell: a....
Describe how each of the following viruses gets into and out of its host cell:
a. A bacteriophage
b. An enveloped animal virus
c. A plant virus
Homework Answers
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Describe how each of the following viruses gets into and out of
its host cell:
a....
1. Which of the following is a valid argument against including viruses in the group of...
1. Which of the following is a valid argument against including viruses in the group of ‘life’? a) Viruses are very small b) SomeviruseshavegeneticmaterialmadeofRNA,notDNA c) Viruses are not capable of independent reproduction d) Virusesinfectawiderangeofhosts e) Viruses can evolve very rapidly 2. M13 is a bacteriophage (a type of virus) that infects E. coli cells, and is capable of integrating into the host genome, becoming a prophage. It is likely to enter the ____________ when conditions are not conducive for rapid...
Viruses- Bacteriology -Describe the characteristics of viruses. -Explain receptors for bacterial viruses (bacteriophage). -How do bacteria...
Viruses- Bacteriology -Describe the characteristics of viruses. -Explain receptors for bacterial viruses (bacteriophage). -How do bacteria prevent the invasion of foreign nucleic acids? -What is reverse transcriptase and which viruses use it? -What type of nucleic acids is in many important human disease-causing viruses? -List the possible consequences of viral infection of an animal cell? -Differentiate between animal and bacterial viruses. -Describe both lytic and lysogenic cycles. -Explain the potential advantages of lysogeny versus lysis for a temperate virus
How do viruses acquire an envelope? Viruses manufacture cell membranes because it is encoded in their...
How do viruses acquire an envelope? Viruses manufacture cell membranes because it is encoded in their nucleic acid. Animal viruses don't make membranous envelopes; these are only produced in phage viruses. Only DNA viruses make envelopes because they have a gene for phospholipid production. When virus are released from host cell, they take the host cell membrane along with synthesized viral glycoproteins.
Which of the following among A-D is false concerning animal viruses? A) During the courses of...
Which of the following among A-D is false concerning animal viruses? A) During the courses of an influenza virus infection, flu virus proteins are likely to be found in the nucleus, host cell membrane, and cytosol. B) The type of life cycle an animal virus possesses is mostly determined by its genome type C) Lambda phage can form a prophage; an equivalent animal virus type like this would be a retrovirus D) Interferons are produced by certain hosts to defend...
10. Which is true about the relationship between viruses and cancers? A. Viruses are no longer...
10. Which is true about the relationship between viruses and cancers? A. Viruses are no longer thought to affect cancer risk. B. All human cancers involve viruses. C. All viruses can cause cancer D. Some viruses significantly raise cancer risk. 11. Which is the best description of viral latency? A. T B. Damage to the host gradually and continuously accumulates. C. A person with a latent infection will not have antibodies to the virus. D. It is usually lethal to...
Animal viruses share all of the following characteristics with living organisms ExcEPT for Possesing genetic information...
Animal viruses share all of the following characteristics with living organisms ExcEPT for Possesing genetic information Having a phospholipid bilayer Having tertiary and pr quaternary proteinature The ability to create proteins As an antiseptic, alcohol works by disrupting plasma membranes. Alcohol wauld be poor choice to use to prevent infection by o Bacteria Non- enveloped viruses Animal Nivuses Fungal pathogens An example of lysogeny in humans would be infection by lysogenic bacteriophage D An acute viral infection Infection by a...
Animal Viruses are released from the host cell by which method A. Budding B. Lysis C....
Animal Viruses are released from the host cell by which method A. Budding B. Lysis C. Exocytosis D. All of the above . E. None of the above
26) A virus obtains its envelope during which of the following phases? A) attachment B) penetration...
26) A virus obtains its envelope during which of the following phases? A) attachment B) penetration C) assembly D) release 27) Which of the following cannot be used to culture viruses? A) tissue culture B) egg C) animal host D) agar plate 28) Which of the following is true of prions? A) They can be inactivated by an autoclave B) They contain DNA C) They are rogue forms of the protein, PrP D) They contain an envelope 29) If an...
Please differentiate between DNA and RNA Viruses and how each one replicates within the host cell.
Please differentiate between DNA and RNA Viruses and how each one replicates within the host cell.
eParamecium 31. Which of the following animal viruses never needs to use the nucleus of its...
eParamecium 31. Which of the following animal viruses never needs to use the nucleus of its host cell to carry out its full replication cycle? a. Papovaviridae b. Herpesviridae c. Retroviridae d. Human Papillomavirus e. Rhabdoviridae 32. Which structures in bacteriophages are responsible for attachment by binding to a host cell receptor? a. spikes b. tail fibers c. prophages d. capsomeres e, nucleotides 33. Which structures in animal viruses are responsible for attachment by binding to a host cell receptor?...
How do viruses acquire an envelope? Viruses manufacture cell membranes because it is encoded in their nucleic acid. Animal viruses don't make membranous envelopes; these are only produced in phage viruses. Only DNA viruses make envelopes because they have a gene for phospholipid production. When virus are released from host cell, they take the host cell membrane along with synthesized viral glycoproteins.
10. Which is true about the relationship between viruses and cancers? A. Viruses are no longer thought to affect cancer risk. B. All human cancers involve viruses. C. All viruses can cause cancer D. Some viruses significantly raise cancer risk. 11. Which is the best description of viral latency? A. T B. Damage to the host gradually and continuously accumulates. C. A person with a latent infection will not have antibodies to the virus. D. It is usually lethal to...
Animal viruses share all of the following characteristics with living organisms ExcEPT for Possesing genetic information Having a phospholipid bilayer Having tertiary and pr quaternary proteinature The ability to create proteins As an antiseptic, alcohol works by disrupting plasma membranes. Alcohol wauld be poor choice to use to prevent infection by o Bacteria Non- enveloped viruses Animal Nivuses Fungal pathogens An example of lysogeny in humans would be infection by lysogenic bacteriophage D An acute viral infection Infection by a...
eParamecium 31. Which of the following animal viruses never needs to use the nucleus of its host cell to carry out its full replication cycle? a. Papovaviridae b. Herpesviridae c. Retroviridae d. Human Papillomavirus e. Rhabdoviridae 32. Which structures in bacteriophages are responsible for attachment by binding to a host cell receptor? a. spikes b. tail fibers c. prophages d. capsomeres e, nucleotides 33. Which structures in animal viruses are responsible for attachment by binding to a host cell receptor?...
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