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

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

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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Arrange 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, 5
You are a virologist studying a newly isolated viral strain and have sequenced its genome. You find that the genome contains 25% A, 55% G, 20% C, and 10% U. Which of the following conclusions is likely correct? This is a single-stranded RNA virus This is a single-stranded DNA virus This is a double-stranded RNA virus This is a double-stranded DNA virus No conclusions can be drawn from this information
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 biological system contains a protein nucleocapsid surrounding 2 antiparallel polynucleotide strands (held together by hydrogen bonds), with deoxyribose sugars, but no ribose sugars? a single-stranded RNA viroid (like avocado sun blotch viroid) a double-stranded RNA virus (like the reovirus family) a single-stranded DNA virus (like fX174 virus of E. coli) a double-stranded DNA virus (like the smallpox virus) a single-stranded RNA virus (like tobacco mosaic virus)
All HPV are non-enveloped double stranded DNA viruses. Their genomes are circular and approximately 8 kilobase pairs in size. Most encode eight major proteins, 6 located in the “early” region and 2 in the “late” region. The “early” proteins are regulatory in function.... Can you please elaborate about the HPV genome in more detail that what I posted above? Thanks.
A viral mutation that causes changes in the glycoprotein spikes would affect which aspect of the virus? The virus would become lysogenic and incorporate its genome into the host cell genome. The virus would enter the host by a combination of endocytosis and fusion. The virus would lose its viral envelope and become a naked virus. The virus would adsorb to different host cells and its host range would be altered. The viral genome would not require uncoating once inside the host cell.
Viral chromosomes exist in a variety of conformations and can be made up of ________. Group of answer choices DNA or RNA DNA Main chromosomes and plasmids Protein coats and plasmids RNA
Imagine that a researcher discovers a new type of virus. This virus contains single‑stranded RNA with "negative" sense. Consider the image. Which statement is true regarding this virus? According to the Baltimore system, this virus would be classified as a type V virus. Based on the presence of single‑stranded RNA, this virus is likely similar to HIV. According to the Baltimore system, this virus would be classified as a type IV virus. This virus must use reverse transcriptase to produce mRNA.
The Ebola virus is an enveloped, helical ssRNA virus that replicates quickly. Given this information, which one of the following is a reason why Ebola infection is difficult to fight (both by our bodies and by treatments)? Question 6 options: Because it has many genes and thus replication is slow. Because it doesn't have a membrane. Because viral RNA polymerases make a lot of mistakes. Because it can integrate into the host cell DNA. Previous PageNext Page
Which of the following proteins would you expect a mutation in for a virus to infect a new host cell? RNA Dependent RNA polymerase/Reverse Transcriptase/DNA polymerase/etc. Hemagglutinin/Glycoprotein/GP120/etc. Fusion protein Capsid/Nucleocapsid proteins Why? What is that protein responsible for?
Choose the correct the correct answer Viral particicles contain both nucleic acid and protein and can replicate inside of a host cell. Technically, this constitutes a "self -replicating molecular assemblage" which is also one way to define life. Therefore, one can conclude that a. Viruses are not living because they don't breathe oxygen b.Viruses are living c.Viruses are not living because they cannot think d. Viruses are not living because this formationis a simple repetitive process without the ability to respond to the environment
Syn5 is a virus that infects photosynthetic bacteria belonging to the genus Synechococcus. The Syn5 virion is icosahedral (660 Å in diameter) with a short tail and an appendage called a horn. The horn is located on a vertex directly opposite the tail. Syn5 follows the typical five steps observed for most viruses when they multiply, and progeny viruses are released when the host lyses. The assembly of Syn5 virions involves several proteins, including capsid proteins, scaffolding proteins, a portal protein, a terminase, tail proteins, and horn proteins. To better understand the assembly of Syn5 virions, scientists used a type of microscopy called Zernike phase contrast electron cryotomography. This type of microscopy improves the contrast typically seen for conventional cryotomography. In their studies, the scientists observed several different developing virus particles in infected cells. The particles were: (1) 660 Å icosahedron containing DNA and having a tail; (2) 660 Å icosahedron…

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	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