Looking at the phylogeny below which shows the relationships between the original SARS-CoV virus and the one we are currently facing, SARS-CoV-2. What is the evidence (in the figure that SARS-CoV-2 did not arise from SARS-CoV in humans?

Q: 4. At which stage of viral infection did these mutations most likely occur?

A: The spread of a dangerous virus within the body is called a viral infection. Tissue damage and the…

Q: 1. "List three properties of a virus that might be used as criteria for classification (taxonomy)

A: Virus is a obligate intracellular parasites which requires living host to survive.

Q: 1.Explain how Toxoplasma gondii is the most successful parasite in the world.  Explain the roles of…

A: A primary host is the organism that a parasite or other organism needs to reach sexual maturity and…

Q: avinger et

A: The rise of diseases like Ebola and COVID-19. It has shown that the world needs to be better…

Q: 1. Pandoravirus salinus is virus that infects amoeba, is very large (1µm) and has a genome composed…

A: Pandoravirus salinus is a large virus that infects amoeba and is one of the largest viruses…

Q: "Briefly describe the two modes that enveloped viruses use for entry into their host cells. 2. How…

A: virus are defined as acellular infectious agents that replicate within living cells. There are three…

Q: You seed a 10cm tissue culture plate with a 4x10^6 HeLa cells. HeLa fells have a doubling time of…

A: Answer - 1ml

Q: 1. What are the five fundamental characteristics (traits) of living organisms? According to these…

A: Living world is called biotic community. It includes all the organisms ranging from unicellular to…

Q: 5. For each of the following questions, select the correct virus or viruses A. Human…

A: A virus is genetic material stored within an organic particle that infects living cells and…

Q: 1) Predict how the frequency of viruses with this deletion will change in the population over . Use…

A: Mutations arise as a natural by-product of infective agent replication.1 ribonucleic acid viruses…

Q: What property of the retroviruses enables them to integrate into thehost genome?a. the RNA they…

A: The virus is the micro-organism that does not replicates independently and depends on host cells. It…

Q: Which of the following is a NOT a true statement about Herpes Simplex Virus Type 1 (HSV-1)?

A: HSV-1 or Herpes Simplex Virus 1 is a common virus found in humans, causing certain medical…

Q: You are a virologist studying a newly isolated viral strain and have sequenced its genome. You find…

A: Option A is correct.

Q: 1. What roles do natural selection and sexual selection play in the evolution of a new virus…

A: Natural selection is the process where better adapted organisms in an environment will survive and…

Q: Match terms with descriptions based on the text above. You can use an answer more than once or not…

A: The terms prevalence and incidence are used to characterize the magnitude of a condition in a…

Q: 1. "Describe how the T‐even bacteriophage attaches and enters the host cells. Which part of the…

A: T-even bacteriophage-tolerant mutants are Escherichia coli strains that can adsorb T-even phages but…

Q: Why is it a strong evolutionary hypothesis that although viruses are the structurally simplest…

A: Viruses are the acellular entities that are considered as sub-microscopic infectious agents. They…

Q: 9. Which of the following statements about influenza A virus is not correct? A. They have…

A: Influenza a virus can cause life threatening complications.

Q: Scientists often see that organisms with similar genetics are susceptible to being infected by…

A: Ans: The genetic study helps scientist to check the susceptibility of an organisms to particular…

Q: 1. List the sequences of events in lytic and lysogenic cycles of viral infections . 2. Which…

A: 1. The life cycle of the bacteriophages has been a good model for understanding how the viruses will…

Q: Throughout history there are many different types of virus that have caused impacts both small and…

A: Throughout history, we have seen many viruses that impacted us in both positive and negative ways.…

Q: The Delta variant of SARS-CoV-2 was first discovered in India in October of November 2020. By the…

A: Part 1: Calculate the Maximum Number of GenerationsWe are given the following information:The virus…

Viral Infections

Viruses are abundantly found, minute entities that have genetic material enclosed within a protein coat. The proteinaceous material enclosing the genetic material of the virus is called a capsid. The genetic material could be either DNA (deoxyribonucleic acid) or RNA (ribonucleic acid). A virus is too minute to be looked at with naked eyes and therefore visualized with the help of a microscope. They are acellular entities that require a host for processes, such as replication, transcription, translation and multiplication. Plants, animals, and bacteria act as host wherein the virus reproduce. Viruses cannot multiply outside the host's body and thus are considered nonliving outside the host body.