Viruses that infect bacterial cells do not infect human cells, and viruses that infect human cells do not infect bacterial cells. Explain why this should be the case.

Q: In general, RNA viruses multiply in the cell , and DNAviruses multiply in the cell .a. nucleus,…

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

Q: As a general rule, viruses are not considered to be alive based on several reasons. One such reason…

A: The first macromolecule to act as genetic material in a living organism was RNA. During the course…

Q: Give one reason for the fact that various viruses have different host ranges.

A: In the living world, we see a large number of microorganisms, animals and plants. These organisms…

Q: The envelope of an animal virus is usually derived from the _____ of its host cell. a. cell wall c.…

A: Animals, plants, and even microorganisms like archaea and bacteria are infected by viruses. In many…

Q: Many viruses have the ability to resurrect dead cells. Why would investigating this feature of…

A: Viruses are intracellular obligate parasites in nature. They depend on the host cell for…

Q: Poxviruses are considered unique among the DNA viruses. Where do poxviruses, such as variola or…

A: Viruses are often considered as an infectious agent, that has either DNA or RNA as their genetic…

Q: What happens to most cells that are invaded by viruses

A: Virus are obligate parasites. They are not metabolically active outside a host cell .

Q: When transmitting a virus to the next host, they usually talk about horizontal and vertical…

A: Virus -  it is the connective link between live and alive  And it is inactive outside the cell

Q: Can RNA viruses synthesize DNA or is it just DNA viruses that can synthesize DNA.

A: RNA viruses can synthesize DNA. Viruses are non-living substance but when the enter into the host…

Q: Explain why a virus can only infect specific cells andorganisms.

A: Viruses are obligate parasites that live inside the host cells.

Q: Viruses are said to be “obligate intracellular parasites.” What does this mean with respect to how…

A: Viruses are infectious particles that requires host cell machinery to replicate. Viruses are…

Q: Explain why antibiotics don’t work against viruses

A: Antibiotics are the medicine that combat the infections in body. Antibiotics can be taken in…

Q: Compare the structures & replication mechanisms of Viroids, Prions, & true Viruses.

A: VIRIODS These extracellular particles are very closely related to the viruses . They are small…

Q: tumor viruses

A: Tumor viruses are the viruses which are capable of causing a wide variety of human diseases. The…

Q: Why must ( 2 ) strand but not ( 1 ) strand RNA viruses bring their own replicase into a cell?

A: A virus refers to an infectious particle that lacks the replication machinery but can replicate…

Q: Even though viruses are known to take over the host cell's metabolism and use the host enzymes for…

A: Viruses show genomic flexibility and almost all RNA viruses are able to change their host mRNA into…

Q: Why can viruses not replicate independently of living cells?

A: Introduction  Central Dogma: it is the key mechanism by which DNA can be transcribed into mRNA by…

Q: The RNA genomes of some RNA viruses resemble the messenger RNA (mRNA) of their eukaryotic hosts.…

A: Answer- There are many viruses that have RNA as a genome called retro viruses. Their genome can be…

Q: Which properties are targeted when scientists develop antiviral drugs? removal of viral MRNAS…

A: The property which must be targeted by the scientists while developing the antiviral drugs is:…

Q: Generally, the DNA viruses have larger genomes than the RNA viruses. How would size be a factor in…

A: A virus, an unseen microorganism, infiltrates our body. It infiltrates our tissues and then…

Q: Viruses that have arisen recently and are more likely to cause infection than previous strains are…

A: Virus : A virus is a small collection of genetic code, either DNA or RNA, surrounded by a protein…

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: Retroviruses, like the HIV, contain an enzyme called reverse transcriptase. Explain the flow of…

A: Introduction: In retrovirus, RNA is used as genetic material. It uses the enzyme…

Q: A virus consisting of a single strand of RNA, which is transcribed into complementary DNA, is a…

A: Retroviruses (family Retroviridae) are enveloped (about 100 nm in diameter), icosahedral viruses…

Q: To discuss: The evolution occurring in viruses and other biological entities.

A: Introduction: Single-celled prokaryotic cells to multicellular eukaryotic cells make up the living…

Q: properties of virus particles

A:

Q: Viruses may be latent for a long period of time. For example, HIV may be latent for many years,…

A: The ability of the virus to stay dormant in a cell is called viral or virus latency. This is the…

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: 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: Some viruses can undergo lysis or lysogeny even in the same host. What might be a reason for this?…

A: Lysogeny Life cycle that takes place when a bacteriophage infects certain types of bacteria

Q: Why are viral diagnoses difficult? Because they are very small and hard to see Because they rarely…

A: Virus  An Infective agent that typically consists of a nucleic acid molecule in a protein coat, is…

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.…

Q: A complete functional virus that has the capacity to infect the living tissue.        A. NOTA B.…

A: The organisms that infect the other organisms or cells are called pathogens. Bacteria can infect…

Q: Why is the nematode,trichinella sp regarded as " the worm that would be a virus"?

A: Nematodes are a class of worms belong to the phylum Nematoda. These are multicellular insects with…

Q: All of the following statements correctly describes the properties of Influenza A virus EXCEPT…

A: Influenza A viruses are negative-sense RNA viruses with  single-stranded, segmented RNA viruses. The…

Q: Can viruses be infected by other viruses

A: Introduction: Microorganisms or microbes are minute organisms that exist as unicellular,…

Q: The image of the virus as shown below is part of the family 0f

A: Virus is a pathogen that lies between living and nonliving. These are living when they enter living…

Q: In some viruses the flow of information is in reverse that is ,from RNA to DNA.can you suggest a…

A: Viruses are classified into distinct classes on the basis of the type of genome they possess and its…

Q: Because viruses lack some of the traits seen in all living things, many scientists do not believe…

A: Viruses are infectious agents and the name is derived from a Latin word, which means poison or a…

Q: Why do some viruses replicate in some anatomical sites and not in others?  Name an example and the…

A: Viruses are acellular parasitic organisms that are thought to be known living outside the host cell.…

Q: Some viral genomes, composed of single-stranded RNA, act as mRNA. What advantage might these viruses…

A: Some viral genomes, composed of single-stranded RNA, act as mRNA.

Q: Larger viruses usually have a double-stranded genome, whereas small viruses typically have a…

A: Only a single nucleic acid molecule is found in all double-stranded DNA genomes, and only a few…

Q: Reverse transcriptase would most likely be inside which virus? a DNA-based lytic virus an RNA-based…

A: The enzyme reverse transcriptase is used to generate complementary DNA (deoxyribonucleic acid) from…

Q: Penicillin is an antibiotic that acts by inhibiting the formation of peptidoglycan cross-links in a…

A: Bacteria is considered as prokaryote while there is no proper classification of virus till date. It…

Q: Viruses with reverse transcriptase enzyme can make a DNA copy out of its RNA genome.  What…

A: Reverse transcriptase (RT) It is an enzyme through a single-stranded RNA transcribes into the DNA.…

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.