Assume you isolate a single stranded (+) RNA virus. When you examine the proteins in the virus, you find that it does NOT contain replicase enzymes within its capsid.  Which of the following is true? This virus must have a gene that encodes replicase. This virus will not be able to enter a host cell. Its genome cannot be translated (the process of translation) by the host cell ribosomes. A DNA copy of the viral genome has to be made before viral genes are expressed. This virus must lack surface antigens

Q: Compare and contrast the composition of a viral genome to that of a cellular organism’s genome.

A: Microbiology is the study of living organisms which cannot be seen through naked eyes (microbes).…

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: SARS-CoV-2, the virus that causes COVID-19, enters cells by binding the cell surface protein ACE2.…

A: SARS-CoV-2 and SARS-CoV enter host cells via the angiotensin-converting enzyme 2 (ACE2) receptor,…

Q: According to origin-of-life scenarios proposed by William Martin, Michael Russell, and Theodor…

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Q: A protein spike of a virus has been identified as an important characteristic of the virus. If the…

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Q: Why not just inject the double-stranded cDNA that codes for the spike protein of the virus? What…

A: Hello. Since you have posted multiple questions and not specified which question needs to be solved,…

Q: Which of the following self-replicating biological agents carries only one polynucleotide chain as…

A: Viruses are the microscopic organisms that cause infectious diseases to the living organisms. They…

Q: A virus (bacteriophage) attaches to a host bacterial cell, inserts the viral DNA into the cell.…

A: Bacteriophages are viruses that infect bacteria.

Q: If a mixture of bacteriophages (viruses), some labeled with radioactive sulfur in their protein coat…

A: Bacteriophages are defined as viruses that will infect the bacteria and replicate only inside the…

Q: given below is a small slice of a large sequence of protein taken from ORF1a polyprotein of Severe…

A: An open reading frame is a stretch of an oligonucleotide that can be translated into a protein…

Q: The dUTPase enzyme is used by the African swine fever virus to repair its own DNA, as the cells the…

A: The African swine fever (ASF) virus is DNA virus, having double stranded DNA as it's genetic…

Q: Which of the following viral nucleic acids can be used as a template to produce mRNA? Select all…

A: The information that is stored in the DNA by itself is of no use. There need to be Mechanisms that…

Q: Viruses replicate by entering a cell and using the host cell's enzymes to produce more copies of…

A: 1- Volume of sphere- 4/3πr3 2- Volume of cylinder= πr2 h Diameter= 2r Here: π=3.14 r=radius of…

Q: You are studying a new retrovirus. The viral protein (X) appears to play a role in the export of the…

A: The nucleus is the structure that encompasses the genome (DNA) in all eukaryotic cells. It is…

Q: What are two things that are true about all known viruses? Hint: one relates to the virus itself,…

A: virus is a submicroscopic infectious agent that replicates only inside the living cells of an…

Q: Covid -19 virus is a RNA-virus that infects the throat cells. What does this mean? Why would the…

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Q: * 00 65 The genomes of DNA viruses can be relatively small (~5,000 nucleotides) but can also be…

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Q: Compare the structure of an icosahedral capsid with that of a helical capsid. How do pentamers and…

A:

Q: The relative amounts of each nitrogenous base are tabulated here for four different viruses. For…

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Q: One advantage of using bacteria and viruses for genetic study is the fact that they have haploid…

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Q: Regarding the influenza virus, which of the following is false? A. The viral mRNAs are translated on…

A: * Influenza is also called as flu which is anan infectious disease caused by influenza viruses.…

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

A: Option A is correct.

Q: Which of the following self-replicating biological agents carries only one polynucleotide chain as…

A: The virus is an obligate parasite they contain either RNA or DNA as their genetic material.…

Q: Suppose that you want to study retroviral integration mechanisms by determining the nucleotide…

A: Different molecular techniques are there to use for the above purpose

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Q: Which of the following characteristics is responsible for making HAV resistant to harsh…

A: Introduction :- Hepatitis is an disorder of liver . Hepato word is used for liver and itis stands…

Q: List the step common to all viral replication pathways.

A: ANSWER:   Viruses are obligate intracellular pathogens therefore Virus particles need the machinery…

Q: During infection of a cell by Coronavirus, the N protein is:     found on the outer surface of the…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

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: Which biological system contains a protein nucleocapsid surrounding 2 antiparallel polynucleotide…

A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…

Q: Given that COVID19 has a single strand RNA for its genome, the number of rounds required to complete…

A: COVID 19 is a SARS virus which causes epidemiological disease called corona virus.

Q: Why are virus genomes small?

A: Viruses are intracellular, obligate parasites, which replicates only inside the living cells of an…

Q: How many viruses are adsorbed per cell (multiplicity of infection)

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: Which one of the numbers below is the minimum number of capsomer proteins to make a spherical virus?

A: The correct option is - 60

Q: Consider a hypothetical phage whose DNA replicates exclusively by rolling circle replication. A…

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Q: An animal virus infects a host cell. The virus has a genome with two strands (see partial sequence…

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Q: Some retroviruses that have a wide host range have been developed for use in treatment of diseases…

A: Retrovirus  as  a vector :-

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Q: Which of the following models best depicts how the genetic information in a retrovirus is eventually…

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Q: Imagine that a researcher discovers a new type of virus. This virus contains single‑stranded RNA…

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Q: Viral chromosomes exist in a variety of conformations and can be made up of ________. Group of…

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A: Virus have two types of life cycle in host cells . The lytic cycle and lysogenic cycle .

Q: After a positive strand RNA virus ( Such as Coronaviruses) enters the host cell, the RNA is…

A:

Q: A bacteriophage has inserted its DNA into a bacterial host and replicated as a part of the host’s…

A: According to the information given here the Phage is in the Lysogenic cycle as its DNA has been…

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…

Viral Replication

The virus is acellular and considered non-living outside the host cell. The replication of the virus occurs only inside the living cells. Only a few genes are present in the smallest virus, whereas many genes are present in the largest virus. These genes encode specific viral proteins.