Based on devolution or the regressive hypothesis, it proposes to explain the origin of viruses by suggesting that they evolved from free-living cells. a. True b. False
Q: Explain how viruses are constructed. How do they work? Can we fine virus fossils? ( How do we…
A: INTRODUCTION Virus Viruses are the smallest unicellular organisms that are obligate intracellular.…
Q: Which of the following explain why it is important to study viruses? Select all that apply. O…
A: viruses are one of the most infectious microbes that are considered nonliving things since they do…
Q: How might the work of anthropology help NOW in terms of stemming the delta variant and other…
A: There is a large number of increase in infections due to delta variants and it even caused large…
Q: Can viruses cause human evolution?
A: Viruses contain genetic material either DNA or RNA enclosed by a protein coat. Viruses infect the…
Q: What is the function of reverse transcriptase in retroviruses? O A. It converts host cell RNA into…
A: Retroviruses are positive sense single stranded RNA viruses which replicate inside the host cells.…
Q: Is there such a thing as a “good virus”? Explain why or why not.Consider both bacteriophages and…
A: Viruses are minute particles that are made up of only their genetic material which may be DNA or RNA…
Q: According to origin-of-life scenarios proposed by William Martin, Michael Russell, and Theodor…
A: Genetic molecules are the biomolecules that represent the genetic material of the organisms. The…
Q: Which is not a correct association with regard tobioengineering?a. plasmid as a vector—bacteriab.…
A: DNA (deoxyribonucleic acid) molecules which act as vehicles for the transport of foreign DNA into a…
Q: What scientific development was a crucial initial step to enhancing our knowledge of virus…
A: Viruses are the connecting link between the living and non-living. Most viruses vary in diameter…
Q: What are the similarities and differences between retroviruses and retrotransposons? It has been…
A: Retroviruses are single-stranded RNA viruses and have two copies of RNA. The whole of the virus…
Q: Viruses are acellular because a. they are biological entities that do not have a cellular…
A: Viruses cause a variety of diseases and lies between living and non-living boundaries. The simplest…
Q: Can viruses adapt by natural selection?
A: Virus is defined as a submicroscopic infectious parasite that resides inside a living cell. It has a…
Q: How could viruses have accelerated the evolution of cells?
A: Evolution is a variation in the genetic structure from one generation to the next one in a given…
Q: One advantage of using bacteria and viruses for genetic study is the fact that they have haploid…
A: The half set of paired chromosomes in the cell is called the haploid genome. The cell that consist…
Q: What is an emerging virus? Give two examples. Propose an experiment to explain how an emerging virus…
A: Viruses are the sub-microscopic pathogens that behave as a pathogen only when it is inside some host…
Q: Suppose that a time machine allows you to go back in time (and to travel to Australia), and you have…
A: Rabbits injected with the virus of same year will have higher survival rate because at that time…
Q: RNA viruses mutate and evolve faster than other viruses. Why?
A: Viruses are infectious parasite that needs host machinery to replicate. Viruses can be either RNA or…
Q: Over time, how does a virus normally become more able to to infect a host organism and be…
A: Answer a) mutations
Q: illustrates Fraenkel-Conrat and Singer’s experiment on the genetic material of TMV. What results…
A: Tobacco mosaic virus (TMV) is a positive-sense single-stranded ribonucleic acid (RNA) virus, which…
Q: Viruses are considered nonliving because Select one: A. They do not locomote. B. They can…
A: Viruses are infectious particles composed of a genetic material either DNA or RNA that is enclosed…
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: The first virus studied that led to the term "filterable virus" was rabies?
A: Filterable virus is a virus that is very tiny so that they can pass through a fine-pored filter like…
Q: Which was the first cell ? Your choices are: a virus, a plant cell or animal cell? Remember to…
A: Living beings, be it plants or animals, are made up of cells. Cells are the fundamental units of…
Q: Do you think that this occurrence of medical breakthroughs that resulted to drug-resistant viruses…
A: Drug resistance occurs when the the viruses,bacteria,fungi etc that is microbes change over time and…
Q: Which of the following can be used to grow and study viruses? A. embryonated eggs B. living…
A: Virus are infectious particles having nucleic acid [DNA or RNA] surrounded by a protein coat. They…
Q: Can viruses evolve?
A: Viruses are small, obligate, intracellular particles that lack the machinery to generate energy for…
Q: There is a big debate if viruses are alive or not. Either way, look at the list below and pick out…
A: The term virus was introduced by Edward Jenner in the year 1798, which means poison in the Greek…
Q: /hich of the following statements must be backed up with an in-text citation of a published sod A. I…
A: The universally excepted general properties of viruses include: They contain RNA or DNA as their…
Q: Some people feel that viruses are living organisms. Give an explanation as to why they cannot be…
A: Microorganisms are those organisms that cannot be seen through the naked eye. These organisms are…
Q: Biology 1. There is evidence to dispove Crick's (1958) Central Dogma of Molecular Biology. one such…
A: The centra; dogma of the molecular biology was given by Francis Crick to explain the formation of a…
Q: Propose an explanation for why during the history of the discovery of viruses they were first called…
A: following is discussion regarding history of viruses and why they were initially labelled as…
Q: viruses are not living, how come they adapt to their environment, replicate and cause infection? In…
A: Viruses contain a set of genes ( either DNA or RNA) enclosed in a protein coat called capsid and…
Q: According to the progressive, or escape, hypothesis, viruses (a) appeared before the three domains…
A: Virus is a relation between living and non living world and it is infectious. This is because ,…
Q: What are the similarities and differences between retroviruses and retrotransposons? It has been…
A: Retrovirus:- Retrovirus is a group of RNA viruses which function by inserting a DNA copy of their…
Q: Emerging viruses arise by(A) mutation of existing viruses.(B) the spread of existing viruses to new…
A: Viruses are the pathogenic agents that cause several diseases in humans as well as in animals and in…
Q: Which of the following is characteristic of all viruses? A. A protein capsid. B. a viral…
A: Viruses are classified as non-cellular, tiny infectious agents. They can only replicate inside the…
Q: A" is a retrovirus. It can integrate DNA into random sites of human genome. Another virus "B" can…
A: Gene therapy is a modern experimental technique that makes use of genes in treating and preventing…
Q: Two students were debating whether viruses are living or nonliving. Student A: Viruses are living…
A: Viruses are obligate intracellular parasite. They are considered non-living entities which can able…
Q: acteriophages and animal viruses do NOT differ significantly in which one of the following steps ?…
A: Bacteriophages are viruses that attack only bacteria whereas animal viruses are viruses that attach…
Q: a.Where could we find viruses? Explain. b.How are viruses structurally formed? Explain.
A: The virus is an infectious agent which replicates inside the host cell using the host machinery.…
Q: RNA viruses mutate and evolve faster than other viruses.why?
A: Answer: Introduction: A virus is a smallest, intracellular parasite. Viruses contains either DNA or…
Q: Researchers have recently discovered giant viruses that are 1 μm in length, the same size as some…
A: All living organisms must perform the basic functions of life process that are necessary for…
Q: Which of the following does NOT inititiate DNA synthesis ? (correct answer e) a. a single-stranded…
A: Deoxy ribo nucleic acid (DNA) is the genetic material of most organisms and it contains coded…
Q: Why are viruses NOT considered living organisms? They are not composed of cells They cannot…
A: Introduction :- A length of nucleic acid (either DNA or RNA), encased in a protein coat, makes up a…
Q: Which viruses have potential for the highest mutation rates, DNA or RNA viruses? Explain
A: DNA viruses and RNA viruses have deoxyribose nucleic acid and ribonucleic acid, respectively. These…
Q: Some advocate stockpiling the drug Tamiflu in the event of an influenza pandemic. Others point out…
A: Tamiflu the generic name is Oseltamivir is an antiviral medicine used for the treatment and…
Q: A virus that has which type of genome must carry replicase within the viral particle? (choose all…
A: RNA-dependent RNA polymerase or RNA replicase is an enzyme that catalyzes the replication of RNA…
Q: Which of the following viral components must get into a cell's cytoplasm in order for the virus to…
A: A and C.
Step by step
Solved in 2 steps
- Propose an explanation for why during the history of the discovery of viruses they were first called filterable agents, then they were thought to be chemicals and finally, why were they able to finally be identified and given a name. – think about this as it relates to technological advancementsWhat is the basic classification of viruses. In other words, if you find a new virus, what is the first thing to determine? A. Is this a DNA or an RNA virus? B. Does it cause blue snotty nosed fever? C. does it have a vector? D. does it infect humans?Define the following terms: a. negative sense RNA virus b. vDNA c. proviral DNA d. macropinocytosis e. temperate phage
- What is an emerging virus? Give two examples. Propose an experiment to explain how an emerging virus could arise.Students are debating about differences between viruses and cells. Which student’s argument is MOST correct using evidence from the diagrams? A. Diagram 1 represents a virus and Diagram 2 represents a cell because viruses do not have nucleic acids but cells do. B. Diagram 1 represents a cell and Diagram 2 represents a virus because a virus has nucleic acids and cells do not. C. Diagram 1 represents a cell and Diagram 2 represents a virus because viruses have a protein capsid while cells have a lipid membrane. D. Diagram 1 represents a virus and Diagram 2 represents a cell because cells have ribosomes to make their own proteins and viruses do not.Which of the following is a property of life that viruses lack? A. The manufacture and use of complex carbon containing molecules B. The potential to grow and expand their populations C. Engages in self-sustaining biological processes such as homeostasis and metabolism D. The potential to pass hereditary material to offspring
- A virus is isolated, and individual virions appear spherical. What type of virus is this? A. Bacteriophage B. Helical C. Icosahedral D. Lysogenicafter a successful infection by a viral particle, it integrates its genome into the host DNA. which term best describe the change of host genome? a. none b.silent mutation c.missense mutation d.frame shift mutationChoose 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
- Evaluate how each of the following results of scientific studies regarding mutations of the SARS-COV2 viral genome may implicate how humans can live with the virus for generations to come. Results Implication Scientific analysis of SARS-COV2 viral genomes from different countries has revealed that the virus accumulates about 2 new mutations per month. Many of these mutations have occurred due to their many battles with the immune systems of their human hosts. The vast majority of mutations have little or no effect on how the virus behaves, but scientists are keeping a watchful eye on mutations of the critical region of the viral genome: the gene encoding the spike protein. Mutations that give the virus an evolutionary advantage should be more likely to turn up repeatedly in the virus’ family tree.Which of the following statements seemingly refute the fact that viruses are nonliving? A.They reproduce themselves only inside a host cell. B. They contain no enzymes. C. They can change over time, with the emergence of new strains. D. They cause diseases similar to those caused by bacteria. E. They are composed of protein and nucleic acid.Think about the cells that viruses infect. Pick out the correct statements below. A. The host cell has some particular thing - be it machinery, chemistry or whatever - that the virus MUST have in order to successfully reproduce. B. Viruse generally don't care what cells they infect. C. Viruses can only replicate in particular hosts and tissues. D. The host range or tissue specficity means the specific type of cells the virus infects. Example - rabies infects neural cells.