1. Pandoravirus salinus is virus that infects amoeba, is very large (1µm) and has a genome composed of double-stranded DNA that is 2.47 Mbp in size (247,000,000 bp). P. salinus has genes not typically associated with viruses, such as genes required for the synthesis of amino acids. In what ways might this force virologists to re-examine the definition of virus?

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: 8. To observe bacteriophage in a lab, you would plate dilutions of the phage onto lawns of bacte-…

A: The plaque examine depends on consolidation of host cells, specially in log-stage development, into…

Q: Which of the following is a known characteristic that can lead to genetic changes in some viruses?…

A: viruses need host cell machinery to replicate themselves.

Q: Which of the following viruses have been used as vectors for gene delivery?

A: Gene delivery is a process of introducing the foreign genetic materials which are DNA and RNA into…

Q: Diagram the life cycle for a virus that uses an RNA-dependent DNA-polymerase.

A: Reverse transcriptase, also known as RNA-dependent DNA polymerase, is a DNA polymerase enzyme that…

Q: True or False- While outside of a host cell, a virus can synthesize its own proteins, but it cannot…

A: A virus is a small piece of genetic material, such as DNA or RNA, encased in a protein coat. A virus…

Q: 6. Variations of the plaque assay can be used to determine the number of animal viruses from a…

A: There are few points about Plaque assay : When treated with the lawn of susceptible cells , a…

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: illustrate the major events in the life cycle of a bacterial and eukaryal ssDNA virus noting, when…

A: Introduction :- Single-stranded DNA (ssDNA) is a type of DNA molecule that consists of a single…

Q: 8) Label each method of mixing genetic material as belonging to dsDNA viruses, retroviruses, SARS…

A: Genetic recombination is a process of cleaving and recombining genetic material between two…

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: Discuss the ways that viruses can be cultivated. Define the terms plaque and necrotic lesion.

A: Introduction  A virus is a tiny infectious particle that can cause disease in living organisms. It…

Q: The host protiens specific for individual virus classes are: a. Docking proteins b. DNA…

A: The correct answer is:c. Proteases

Q: 13) The end product in case of DNA polymerase during the Lumpy skin disease virus replication is :…

A: The lumpy skin disease is caused by the virus capripox and in this disease the cartels get infected.

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

A: Option A is correct.

Q: Properties of viruses include: a. ability to replicate in any environment b. visibility under…

A: The small microscopic organisms that cannot be seen with the naked eye are called microorganisms or…

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: Match the following: a.naked, polyhedral DNA virus b.enveloped, polyhedral DNA virus c.enveloped,…

A: Characteristics of viruses- acellular, can not replicate unless inside of a cell, metabolically…

Q: 4. Write a discussion on the "Structure of Virus". (You may read chapter 17 and any other peer-…

A: Viruses are tiny obligatory intracellular parasites with a virus-coded protein sheath enveloping an…

Q: Which of the following events mostly involves hydrolysis reaction after the virus infects a…

A: Question -Which of the following events mostly involves hydrolysis reaction after the virus infects…

Q: Poxviruses are unusual among DNA viruses because their replication cycles takes place entirely in…

A: Introduction The Family Parvoviridae Includes Parvoviruses, Which Are A Group Of Animal Viruses.…

Virus

Viruses are infectious microscopic agents that can only reproduce in live cells of animals, plants, or microbes and are smaller than bacteria. Vertebrates, invertebrates, plants, protists, and fungi are among their many hosts. Viruses are unable to multiply on their own due to the lack of necessary cellular machinery, but they can guide the cell machinery of a host to make additional viruses by infection. The virus enters and attaches to a particular host cell, injects its genetic material, and reproduces by using the host’s genetic material. Viruses cause infection by taking entry into the host cell and using the host cell’s enzymes and raw materials to multiply.