Which of the following statements regarding viral classification is FALSE? Question options: all known viruses have been classified into genera and families all viruses are not descended from a common viral ancestor some viral families have been classified into orders the presence or absence of an envelope is one criterion upon which viral classification is based viral classification is based, in part, on the presence or absence of a capsid all these statements are TRUE

Which of the following statements regarding viral classification is FALSE? Question options: all known viruses have been classified into genera and families all viruses are not descended from a common viral ancestor some viral families have been classified into orders the presence or absence of an envelope is one criterion upon which viral classification is based viral classification is based, in part, on the presence or absence of a capsid all these statements are TRUE

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter17: The Immune System And Disease

Section: Chapter Questions

Problem 1ACQ: Figure 17.5 Which of the following statements about virus structure is true? a. All viruses are...

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Which of the following statements regarding viral genomes is FALSE? Question options: viral genomes are always comprised of RNA viral genomes are smaller than the genomes of cellular life viral genomes can be either single-stranded or double-stranded viruses can have as few as three genes viral genomes do not encode ribosomal RNAs all these statements are TRUE The ______________ of a virus is a phospholipid bilayer with embedded proteins and glycoproteins Question options: capsid chromosome envelope nucleocapsid spike receptor
How is the construction of large icosahedral viral capsids different from small icosahedral viral capsids? Large viral capsids have: (select all that apply) Greater numbers of subunits A smaller triangulation number More types of capsid subunits Non-spherical capsid shape Larger subunits
The International Committee on Taxonomy of Viruses (ICTV) has established nomenclature rules for viruses. Which of the following would be considered a viral family name? Rotavirus Adenovirus Poxviridae Herpevirales
Since our current pandemic is caused by SARS-CoV-2, a coronavirus, let us get to know it better by labelling the virion diagram that follows using only the appropriate terms found on the word bank given. protein M (Made of?) protein E What viral shape does it have? Coronavirus genomic material capsid envelope viral appendages DNA RNA helical polyhedral enveloped complex
Put the viral taxonomy in hierarchical order from most broad to most specific. > Family Genus Species Order
Review the descriptions from the Baltimore system of virus classification. Group II: Single‑stranded DNA, (+) senseGroup III: Double‑stranded RNAGroup IV: Single‑stranded RNA, (+) senseGroup V: Single‑stranded RNA, (−) senseGroup VI: Single‑stranded RNA, (+) sense, Reverse transcriptase Review the descriptions from the Baltimore system of virus classification. Group II Group III Group IV Group V Group VI
Which of the following is true about capsid? There could be more than one answer. Present in both enveloped and naked virus. Composed of individual protein molecules called capsomeresiral nucleic acid. Houses the viral nucleic acid. Capable of self-assembly. Not present in coronavirus
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 Saved
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.
Arrange the following list into the correct sequence for viral reproduction: 1. penetration 2. assembly 3. replication 4. attachment 5. release (a) 1, 2, 3, 4, 5 (b) 5, 2, 3, 4, 1 (c) 4, 1, 3, 2, 5 (d) 4, 1, 2, 3, 5 (e) 3, 1, 2, 4, 5
All of the following statements correctly describes the properties of Influenza A virus EXCEPT A-Viral transcription occurs in the nucleus B-Mature virion are released by budding C-Single stranded positive sense RNA virus D-Attaches to cell-surface sialic acid
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.

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	all known viruses have been classified into genera and families
	all viruses are not descended from a common viral ancestor
	some viral families have been classified into orders
	the presence or absence of an envelope is one criterion upon which viral classification is based
	viral classification is based, in part, on the presence or absence of a capsid
	all these statements are TRUE