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: 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 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: Why are lytic viruses better suited as agents of “phage therapy” thanare lysogenic viruses? How…

A: Phage therapy means the use of phages to cure a particular disease. Phages are the specific virus…

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: Discuss ways that you might distinguish whether an infectious disease in mice is caused by a virus…

A: Infectious diseases can occur by infectious agents that are protozoa, viruses, bacteria, and fungi.…

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: 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: A prophage occurs during the reproduction cycle of Select one: O A. A lysogenic virus. O B. Alytic…

A: Viruses possess two types of life cycle: lytic cycle and lysogenic cycle. The lysogenic cycle of…

Q: How does Covid-19 infect and effect the respiratory system? Are other body systems affected by the…

A: Coronavirus or Covid-19 is the most prevailing disease in the current days all around the world. The…

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: Like all viruses, HIV must utilize the host: ○ a. reverse transcriptase. ○ b. ribosomes. О с.…

A: HIV (Human Immunodeficiency Virus) is a retrovirus that targets CD4+ T cells in particular,…

Q: Which of the following statements seemingly refute the fact that viruses are nonliving? A.They…

A: Viruses may or may not be alive, according to scientists. Generally, scientists employ a set of…

Q: You seed a 10cm tissue culture plate with a 4x10^6 HeLa cells. HeLa fells have a doubling time of…

A: Answer - 1ml

Q: In the lytic life cycle of phages. Select one: O a. the cell typically dies, releasing many copies…

A: Bacteriophages are viruses that infect bacteria. The stages included in the lytic cycle are…

Q: Will it be possible to eradicate many viral diseases in the same way as smallpox? Why or why not?

A: To explain: Whether it is possible to eradicate many viral diseases in the same way as smallpox

Q: 3. (a). Illustrate and describe the lytic and lysogenic cycles for the production of viruses. (b).…

A: Introduction :  A prokaryotic organism with only one cell is a bacteria. They lack a nucleus and…

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: omparing influenza viruses and COVID-19 pandemic coronavirus, both these viruses can incre enetic…

A: Genetic diversity can be increased through mutation, sexual recombination, random mating and random…

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: Bonus: Louis Pasteur was famous for developing the first rabies vaccine. He used the vaccine in…

A: Louis Pasteur vaccinated two boys who had been bitten by a rabid dog. Louis Pasteur used the vaccine…

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: Which type of virus is theHIV? What is the enzymereverse transcriptase presentin HIV?

A: Viruses are minute particles that are made up of only their genetic material which may be DNA or RNA…

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: Describe several cytopathic effects of viruses. What causes thechanged appearance of the host cell,…

A: When the host cell is invaded by a virus, its structure changes. This effect is known as cytopathic…

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: We are close to having 2 RNA vaccines for covid.  (8 pts) Use what we know about the chemical…

A: mRNA vaccine is the type of immunization technique which uses central dogma of molecular biology to…

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…

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.