This table lists three hypothetical versions of the spike protein gene in the coronavirus. The B version is the original version in bats; the H and N versions have mutations. The last two columns show the characteristics of the spike protein for each version of the spike protein gene. Version of the Spike Protein Gene B H N H ΟΝ O B B and N OH and B Spike protein can bind to molecules on the surface of ON and H Bat Cells Yes Which version of the spike protein gene will result in a spike protein that will allows a coronavirus to enter a human cell to reproduced by the cell? No No Human Cells No Yes No

This table lists three hypothetical versions of the spike protein gene in the coronavirus. The B version is the original version in bats; the H and N versions have mutations. The last two columns show the characteristics of the spike protein for each version of the spike protein gene. Version of the Spike Protein Gene B H N H ΟΝ O B B and N OH and B Spike protein can bind to molecules on the surface of ON and H Bat Cells Yes Which version of the spike protein gene will result in a spike protein that will allows a coronavirus to enter a human cell to reproduced by the cell? No No Human Cells No Yes No

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter12: Body Defenses

Section: Chapter Questions

Problem 2TAHL

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ss (-) RNA viral genome RNA polymerase RNA-dependent # O dsRNA O dsDNA. RNA-dependent RNA polymerase Coples (-) RNA strand transcription Copies (-) RNA strand. 80 ss (+) RNA S5 FA viral translation protein (+)RNA (viral mRNA) RNA-dependent RNA polymerase Copies (+) RNA strand. What type of virus is replicating in the picture? (-)ssRNA (+)ssRNA % C wil ss (-) RNA viral genome <(C 16 & 7
Of all the double-stranded DNA animal viruses, poxviruses stand out concerning one unique aspect of theirDNA replication process. What is this unique aspect, andhow can this be accomplished without special DNAreplication enzymes being packaged in the virion?
Given that BOVID-12 seems to have a significant affect on brain organoid size you decide to take iPSCs and differentiate them into neurons. The iPSCs mature into early neural progenitor cells (Early NPCs), then late neural progenitor cells (Late NPCs), and then neurons. You take each of these four cell types and infect them with the BOVID-12 virus. The results are shown below: Early NPCs Late NPCs Cell viability relative to mock infection iPSCs → IPS cells Neurons Late NPCs 120% 100%- 80%- 60%- 40%- 20%- 0%- 0.1 1 Amount of virus Which cell type(s) are unaffected by the virus? Both Early and Late NPCs wwwwwww.. iPSCs and Neurons Early NPCs Neurons 10
Viruses can easily mutate exchange genetic material, mechanisms referred to as antigenic drift and antigenic shift. These changes allow the virus to evade the immune system defenses. Match each term with the correct definition Antigenic drift [ Choose ] [Choose ] Different strains of a virus or strain of different viruses, combine and form a new strain that now has a mixture of the surface antigens Antigenic shift The virus changes genetically by accumulating mutations within the genes that code for antibody-binding sites
Researchers studying the SARS-CoV-2 virus, also known as COVID-19, have found that the virus is able to circumvent its host cell's normal defenses by leaving the cell via its lyso- somes rather than its normal secretory vesicles, as illustrated in the figure below. endoplasmic reticulum nucleus disrupted lysosomal functions Entry and egress of the SARS-CoV-2 virus A Golgi complex Which of the following best explains their findings? B lysosome (deacidified) С lysosome (acidified) B-coronavirus normal biosynthetic pathway egress via lysosomal trafficking SARS-CoV-2 inhibits lysosomes of its host cells by decreasing the pH within them. SARS-CoV-2 activates lysosomes of its host cells by decreasing the pH within them. SARS-CoV-2 activates lysosomes of its host cells by increasing the pH within them. D SARS-CoV-2 inhibits lysosomes of its host cells by increasing the pH within them.
Antigenic shifts in influenza viruses are represented by dra-matic changes in the viral antigens. It is likely they arise fromrare events in which:(a) Two different influenza viruses infect a cell at the sametime(b) Two separate viruses undergo lysogenic conversion(c) Two viruses conjugate(d) Mutations accumulate(e) All of the above
Viruses with negative sense RNA genomes typically, make proteins by: (Ignore retroviruses, and the unusual characteristics of coronaviruses) Translation of short RNA transcripts generated by RDRP Generating a DNA copy, which is then transcribed by host RNA polymerase. Translation of the viral genome by host ribosomes. Production of a polyprotein, which must be cleaved into smaller proteins. Generating a negative sense genome copy, which is then translated by host ribosomes.
The diagram below shows the Covid-19 virus with its spike protein. It also shows the area on the spike protein which binds to the ACE2 receptor (receptor binding domain). Corona Virus Receptor Binding Domain (RBD) Spike Protein In order to get into a cell, the Covid-19 virus needs to bind to the ACE2 receptor. Once bound it is brought into the cell. These receptors are found on cells making up various tissues (oral and nasal mucosa, nasopharynx, lung, stomach, small intestine, colon, skin, lymph nodes, thymus, bone marrow, spleen, liver, kidney, and brain). The symptoms for Covid-19 are linked to the tissue cells the virus infects. To the right is a diagram showing the biding of the spike protein to the ACE2 receptor. SARS-COV-2 Spike (S) Host Cell ACE2 acer
Within the long-terminal repeat in the retrovirus genome is a PBS. If the PBS was mutated such that the molecule could no longer bind, what consequence would this have on the retrovirus life-cycle? Explain your answer. TTTT Paragraph Arial v a (12pt) E- E. T OIX8
Several negative-strand viruses carry their genomeas a set of discrete RNA segments. Examples include influ-enza virus (eight segments), Rift Valley fever virus (threesegments), Hantavirus (three segments), and Lassa virus(two segments), to name a few. Why does segmentation ofthe genome provide a strong evolutionary advantage forthese viruses?
1. Precise words:Find the nonspecific terms in the following sentences. Replace the nonspecific choices with more preciseterms or phrases (It is not necessary to change the sentence structure).(i) All OVE mutants showed enhanced iP concentrations.(ii) Plants were kept in the cold overnight.(iii) To provide proof of concept for our hypothesis, we studied a virus in its host cell.(iv) The present paper reports on continuing experiments that were performed to clarify thissurprising effect.(v) The first transition state is a little lower in energy than the second transition state. 2. Simple words:Improve the word choice in the following examples by replacing the underlined terms or phrases withsimpler word choices (do not change the sentence structure).(i) These data substantiate our hypothesis.(ii) The difference in our results compared to those of Reuter et al. (1995) can be accounted forby the fact that different conditions were used.(iii) For the purpose of discussing cell migration we…
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