In the 1880s, Louis Pasteur developed a method of weakening viruses. The weakened viruses could be injected into healthy individuals. How is this method effective in fighting viral diseases? O The immune system develops antibodies in response to the weakened viruses. O The rate of genetic mutation in the host is decreased due to the introduction of weakened viruses. O Weakened viruses are unable to enter the host organism. O The weakened viruses attach to unaffected viruses in the host and interrupt the viral reproductive cycle.

Q: In what environment can viruses replicate themselves? O Inside the cells of living organisms O…

A: According to the question, we have to mention what type of environment viruses can replicate…

Q: 19. An investigaor is conducting a study of n outbreak of severe nausea, vomitting and diarrhea…

A: Outbreaks can be defined as a sudden rise in the number of disease cases which occurs when cases…

Q: Which of the following is NOT true about viruses? O a. The vast majority cause severe disease of…

A: Virus  Viruses are non living particles when present out side the host cell and when enters/ infects…

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 is a common order of the steps in a viralreproductive cycle? (Note:…

A: Viruses are sub microscopic infectious agents. They can infect all types of organisms from plants…

Q: People who receive MRNA vaccinations for COVID-19 cannot come down with the disease itself because:…

A: Immune system is responsible for removing the pathogen outside the body.

Q: 3. SARS-CoV-2, the causative pathogen of COVID-19 diseases, is a virus. Is virus a living organism?…

A: Microorganisms or microbes are those organisms that cannot be viewed by unaided eyes and are studied…

Q: What component of the virion is gained in the process of budding?

A: Viruses are obligate parasites. They are non cellular entities which have their RNA (ribonucleic…

Q: In the extracellular phase, HIV is considered to be infectious Oparasitic Olysotropic O symbiotic O…

A: Initially HIV infect T cell and macrophage  directly or is carried to these cell by langerhans…

Q: HIV is a virus that infects human beings, which of the following is not a characteristic of this…

A: HIV can result in AIDS if remains untreated for a long time as the virus attacks the immune system…

Q: TU Viruses recombined to produce an HSN1 strain Which procms occan Antigenic shit O Antigenic dn O…

A: influenza A virus subtype H1N1 is a subtype of Influenza A virus. H5N2 influenza virus is a…

Q: Snow leopards are solitary animals. An individual leopard will maintain a huge territory. They meet…

A: The small, minute and microscopic organisms are called microorganisms. The main groups of…

Q: What happens during the lytic cycle of viruses? A large number of phages are released at a time.…

A: A bacteriophage is a virus that attacks bacteria. According to the situation it replicates by the…

Q: Viruses replicate their genomes in the nucleus ofthe host cell. Explain why or why not.

A: A virus is a small infectious agent that can’t be seen through the unaided eyes. The viruses contain…

Q: When phage nucleic acid is incorporated into the nucleic acid of itshost cell and is replicated when…

A: A virus has genetic material that can be deoxyribonucleic acid (DNA) or ribonucleic acid (RNA)…

Q: What is a common feature found in all viruses?a. An envelopeb. DNAc. Nucleic acid surrounded by a…

A: Viruses are the small, non-living, and infectious agents having the genome of nucleic acids. They…

Q: two viruses infect the same cell. This results in the production of new viruses that contain genetic…

A: Infection refers to the entry of microorganisms into a host body followed by multiplication of the…

Q: HIV attacks only specifi c types of human cells, such as certain white blood cells and nerve cells.…

A: BASIC INFORMATION SEXUALLY TRANSMITTED DISEASES These are the disease which spread from one person…

Q: emdesivir is an antiviral drug that is currently being used to treat COVID-19. Which part of the…

A: Ans: Remdesivir is an antiviral medicine that originally first tested against the Ebola virus in…

Q: Explain why many countries worldwide ( including Philippines) is willing to spend money just to get…

A: After a year into the COVID-19 pandemic, coronavirus disease, the world effort to develop and…

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: 5) The RNA polymerase (DDRP), one option is incorrect : a. Can work to produce the genomic RNA of…

A: B answer is incorrect.

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: Why are viruses not grouped into any of the six kingdo They are not capable of independent metabolic…

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

Q: The first phase in the multiplication of Bacteriophages is

A: Bacteriophages are viruses that infect bacteria.

Q: What is the function of the protein spikes on a virus?

A: Spike proteins or peplomer are proteins that are present in the outer layer/ envelope of the virus.…

Q: A prophage occurs during the reproduction cycle of

A: the virus which infect the bacterial cell is termed as the bacteriophage. the prophage is formed…

Q: How does a prion differ from a viroid? How does a prion differfrom a virus?

A: Microorganisms are small organism that cannot be seen by naked eyes. Microorganism can be harmful to…

Q: Which of the following components of a virus is NOT encoded by its own genome? O capsid of HIV O…

A: HIV (Human Immunodeficiency Virus) is a retrovirus that primarily infects human immune cells,…

Q: When it comes to viral infections, there are few treatment options O the limited number of…

A: Viruses are not considered living organisms as they do not exhibit all the characteristics of living…

Q: Your doctor tells your friend that he has a viral infection in his throat. The pain is intolerable…

A: Given:  My friend has a viral infection in his throat, according to the doctor. He needs to study…

Q: What does the term "lentivirus" mean? OA virus that inserts its DNA into the host's DNA Oa virus…

A: Introduction:  Lentivirus is any of a group of retroviruses  that produce illnesses which is…

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: A botanist notices that a tomato plant looks diseased. How could the botanist confirm that the agent…

A: Viroids considered as the smallest infectious plant  pathogens .are composed solely of a short…

Q: 14. Select the answer that details the general steps in viral multiplication. O Endocytosis,…

A: Viruses are acellular and therefore, they use host cell machinery for their own synthesis. Although…

Q: The lipid content of an enveloped virus is produced from O freely available tipids O viral made…

A: Host membrane

Q: How can viral infections in humans be prevented? Taking drugs that inhibit transcription O Taking…

A: Small infectious entities called viruses enter living cells and use the genetic resources of their…

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: One of the following is CORRECT of the characteristics of herpesviridae? A. Can be dormant in the…

A: Herpesvirus belongs to the family herpesviridae, double-stranded DNA viruses with relatively large…

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.