AnswersBiology - SC3209 ICViruses

Viruses Answers

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ABCDEThe pieces made in replication are assembled to complete the new virus particles.

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ABCDEThe new viral nucleic acid and viral proteins are replicated.

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ABCDEThe virus attaches to the host cell.

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ABCDEThe original virus releases a protein that causes the cell wall to burst (lysis), killing the cell and releasing viruses.

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ABCDEThe host’s DNA is disassembled and the virus takes over the cell’s metabolic activity.

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ABCDEFcell division

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A✔ BCDEFprovirus formation

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Identify the characteristics of a virus. Check all that apply.

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measures 20-300 nanometers
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grows and reproduces
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infects all forms of living cells
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contains a cell membrane
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does not respond to stimuli
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contains DNA or RNA, not both
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Polyhedral virusesHelical virusesX Enveloped virusesComplex viruses have a capsid that has polyhedral and helical characteristics, and may have extra structures like protein tails. Bacteriophages are examples.

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Polyhedral viruses
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Helical viruses
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Enveloped viruses
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Complex viruses
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Identify the structures a virus can contain. Check all that apply.

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nucleic acid
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ribosomes
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cell membrane
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capsid
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envelope
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AX BCD✔ EFreplication and assembly of virus

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Identify the characteristics of a cell. Check all that apply.

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measures 3-500 micrometers
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infects all forms of living cells
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grows and reproduces
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responds to stimuli
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contains DNA or RNA, not both
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contains a cell membrane
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Polyhedral virusesX Helical virusesEnveloped virusesComplex viruses have an outer lipid bilayer known as a viral envelope, which is studded with proteins. Influenza and HIV are examples.

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Polyhedral viruses
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Helical viruses
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Enveloped viruses
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Complex viruses
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✔ ABCDX EFattachment and entry

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Polyhedral viruses✔ Helical virusesEnveloped virusesComplex viruses have long narrow capsids shaped liked cylinders. Rabies and ebola are examples.

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Polyhedral viruses
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Helical viruses
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Enveloped viruses
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Complex viruses
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ABCDEFprovirus leaves

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Polyhedral virusesHelical virusesEnveloped virusesComplex viruses have long narrow capsids shaped liked cylinders. Rabies and ebola are examples.

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Polyhedral viruses
B
Helical viruses
C
Enveloped viruses
D
Complex viruses
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ABCDEFlysis and release of virus

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