Mt Simulation Examination 5

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  • 1/128 Questions

    Viruses can result in acute death of the host.

    • True
    • False
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About This Quiz

This is a Simulated Examination for Gulf Medtech/Labtech Examinations taken from Last Month's HAAD Feedbacks.
This examination contains 100 of the most UPDATED EXAMS from Abu Dhabi, KSA, and UAE.
Take this examination for 120 minutes. You need to get 86% to pass the HAAD. 60% to pass MOH, DHA, or Prometrics.
Please text 0919-286-29-29 in the Philippines or visit our website www. Rtonline. Weebly. Com THIS IS YOUR ASSESSMENT FOR ANY GULF RT EXAMINATIONS INCLUDING HAAD MT, SAUDI PROMETRICS, DUBAI DHA, AND UAE MOH. THE QUESTIONS HERE ARE TAKEN FROM THIS ACTUAL EXAMINATIONS, SO PASSING THIS ASSESSMENT EXAM WILL GIVE YOU A HIGH PROBABILITY OF PASSING THE SAID EXAMINATIONS

Mt Simulation Examination 5 - Quiz

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  • 2. 

    The virus' structure is a:

    • Dodecahedron.

    • Icosahedron.

    • Square.

    • Tetrakaidecagon.

    • Tetradecagon.

    Correct Answer
    A. Icosahedron.
    Explanation
    Icosahedron: A solid with 20 triangular faces and 12 vertices related by 2-, 3-, and 5-fold axes of symmetry.

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  • 3. 

    The best treatment for arboviruses is prevention

    • True

    • False

    Correct Answer
    A. True
    Explanation
    The statement "the best treatment for arboviruses is prevention" is true. Arboviruses, such as Zika virus and West Nile virus, are primarily transmitted through mosquito bites. Currently, there are no specific antiviral treatments available for these viruses. Therefore, the most effective approach is to prevent mosquito bites by using insect repellents, wearing protective clothing, and eliminating breeding sites for mosquitoes. This emphasizes the importance of prevention strategies in controlling arbovirus infections.

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  • 4. 

    Transmission of Epstein-Barr Virus (EBV) can be direct, oral contact and contamination with saliva

    • True

    • False

    Correct Answer
    A. True
    Explanation
    The transmission of Epstein-Barr Virus (EBV) can occur through direct oral contact and contamination with saliva. This means that the virus can be spread through activities such as kissing, sharing utensils or drinks, and even through coughing or sneezing. Therefore, the statement is true.

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  • 5. 

    Which of the following treatments are used for rhinoviruses?

    • Antivirals/ nasal sprays

    • Sabin/ salk vaccine

    • Self limiting, no drug therapy available

    • Heat to 30 degrees celcius

    Correct Answer
    A. Antivirals/ nasal sprays
    Explanation
    Antivirals and nasal sprays are used as treatments for rhinoviruses. Rhinoviruses are the most common cause of the common cold, and these treatments can help alleviate symptoms and reduce the duration of the illness. Antivirals work by inhibiting the replication of the virus, while nasal sprays can help relieve nasal congestion and inflammation. These treatments can be used to manage the symptoms of rhinovirus infections, but there is currently no specific cure for the virus itself.

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  • 6. 

    Which virus causes SARS?

    • Rhinovirus

    • Coronavirus

    • Arbovirus

    • None of the aboce

    Correct Answer
    A. Coronavirus
    Explanation
    The correct answer is coronavirus. Coronavirus is the virus that causes Severe Acute Respiratory Syndrome (SARS). SARS is a viral respiratory illness that emerged in 2002 and caused a global outbreak. It is characterized by symptoms such as fever, cough, and difficulty breathing. The coronavirus responsible for SARS is known as SARS-CoV.

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  • 7. 

    Program cell death induced by some viruses during release has an antiviral effect

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Programmed cell death induced by some viruses during release has an antiviral effect because it helps limit viral replication and spread. When a virus infects a cell, it can trigger a process called apoptosis, which leads to the controlled death of the infected cell. This prevents the virus from using the cell's resources to replicate and helps contain the infection. Additionally, apoptosis can stimulate the immune system to recognize and eliminate infected cells. Therefore, programmed cell death induced by some viruses during release can be considered an antiviral defense mechanism.

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  • 8. 

    Hep A, B and C are all RNA viruses.

    • True

    • False

    Correct Answer
    A. False
    Explanation
    Only Hep A and Hep C are RNA viruses. Hep B is a DNA virus.

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  • 9. 

    Owl's eye like inclusion body is seen with  

    • EBV

    • CMV

    • HCV

    • HPV

    Correct Answer
    A. CMV
    Explanation
    Owl's eye like inclusion body is a characteristic finding in cytomegalovirus (CMV) infection. CMV is a common virus that can cause a variety of symptoms and complications, particularly in individuals with weakened immune systems. The owl's eye inclusion bodies are viral particles that can be seen within infected cells under a microscope. These inclusion bodies are named after their resemblance to the eyes of an owl, with a dark center surrounded by a clear halo. This finding is helpful in diagnosing CMV infection.

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  • 10. 

    Which best describes viruses?

    • Facultative intracellular parasites

    • Protein core surrounded by nucleic acid

    • Contain double or single stranded RNA or DNA

    • Main opposition from humoral immunity

    Correct Answer
    A. Contain double or single stranded RNA or DNA
    Explanation
    Viruses are microscopic infectious agents that consist of genetic material (either RNA or DNA) enclosed in a protein coat. They are not considered living organisms as they cannot reproduce or carry out metabolic activities on their own. Instead, viruses rely on host cells to replicate and cause infection. The answer "contain double or single stranded RNA or DNA" accurately describes the genetic material found in viruses.

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  • 11. 

    Which of the following is not caused by arboviruses?

    • SARS

    • WNV

    • Hemorraghic fever

    • Rash and arthritis

    Correct Answer
    A. SARS
    Explanation
    caused by corona virus

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  • 12. 

    Viruses can replicate in the:

    • Cytoplasm

    • Nucleus

    • Both cytoplasm and nucleus.

    Correct Answer
    A. Both cytoplasm and nucleus.
    Explanation
    Viruses can replicate in both the cytoplasm and nucleus of a host cell. Some viruses replicate solely in the cytoplasm, while others replicate in the nucleus. The location of replication depends on the type of virus and its specific life cycle. Viruses that replicate in the cytoplasm usually do not require access to the host cell's nucleus, as they can utilize the host cell's machinery in the cytoplasm to replicate. On the other hand, viruses that replicate in the nucleus require access to the host cell's nucleus to access the necessary cellular machinery for replication.

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  • 13. 

    Match the following types of persistent infections with the definitions below: Chronic infections, latent infections.1. Virus is detectable in tissue samples, multiplying at a slow rate; symptoms mild or absent.2. After a lytic cycle, virus enters a dormant phase; generally not detectable, no symptoms; can reactivate and result in recurrent infections.

    • Chronic infections = 1, Latent infections = 2.

    • Latent infections = 1. Chronic infections =2.

    • The definitions given do not match the terms given.

    Correct Answer
    A. Chronic infections = 1, Latent infections = 2.
    Explanation
    The given answer is correct because it correctly matches the types of persistent infections with their corresponding definitions. Chronic infections are characterized by the virus being detectable in tissue samples and multiplying at a slow rate, while symptoms may be mild or absent. On the other hand, latent infections occur after a lytic cycle where the virus enters a dormant phase, making it generally not detectable and without symptoms. However, it can reactivate and result in recurrent infections.

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  • 14. 

    Which treatment option is specifically activated by HSV induced thymidine kinase enzyme

    • Acyclovir

    • Famciclovir

    • Penciclovir

    • Valacyclovir

    • Topical medications

    Correct Answer
    A. Acyclovir
    Explanation
    Acyclovir is the correct answer because it is specifically activated by the HSV induced thymidine kinase enzyme. This enzyme is produced by the herpes simplex virus (HSV), and it is responsible for converting acyclovir into its active form. Once activated, acyclovir inhibits the replication of the virus by blocking the viral DNA synthesis. Therefore, acyclovir is an effective treatment option for HSV infections. Famciclovir, penciclovir, and valacyclovir are also antiviral medications used to treat HSV infections, but they are not specifically activated by the HSV induced thymidine kinase enzyme. Topical medications may be used to relieve symptoms but are not specific treatment options for HSV infections.

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  • 15. 

    Herpesviruses are large enveloped icosahedral dsDNA

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Herpesviruses are indeed large enveloped icosahedral dsDNA viruses. This means that they have a double-stranded DNA genome and are enclosed in an envelope. The term "icosahedral" refers to their shape, which is a polyhedron with 20 triangular faces. These characteristics are typical of herpesviruses, making the statement true.

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  • 16. 

    Poliviruses and arboviruses can cause flaccid paralysis

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Polioviruses and arboviruses are known to cause flaccid paralysis. Polioviruses are responsible for causing polio, a viral infection that can lead to muscle weakness and paralysis. Arboviruses, which include viruses like West Nile virus and Zika virus, are transmitted by arthropods such as mosquitoes and can also cause flaccid paralysis in some cases. Therefore, the statement that polioviruses and arboviruses can cause flaccid paralysis is true.

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  • 17. 

    What enzyme is used in the replication of progeny genomic RNA molecules?

    • Viral specific RNA ligase

    • Viral specific RNA polymerase

    • Bacterial specific RNA polymerase

    • Bacterial specific DNA ligase

    Correct Answer
    A. Viral specific RNA polymerase
    Explanation
    Viral specific RNA polymerase is the correct answer because it is the enzyme used in the replication of progeny genomic RNA molecules. RNA polymerase is responsible for synthesizing RNA strands by catalyzing the formation of phosphodiester bonds between nucleotides. In the case of viral replication, viral specific RNA polymerase is required as it is specific to the viral genome and can accurately replicate the viral RNA. Bacterial specific RNA polymerase and bacterial specific DNA ligase are not relevant to the replication of viral RNA molecules.

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  • 18. 

    HBV has an unusual genome containing both double- and single-stranded DNA

    • True

    • False

    Correct Answer
    A. True
    Explanation
    HBV stands for Hepatitis B virus, which is a virus that infects the liver. The genome of HBV is indeed unusual because it contains both double-stranded DNA and single-stranded DNA. Most viruses have either double-stranded or single-stranded DNA, but HBV has both. This unique genome structure allows HBV to replicate in a complex manner and contributes to its ability to persist in the body for long periods of time. Therefore, the statement "HBV has an unusual genome containing both double- and single-stranded DNA" is true.

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  • 19. 

    By mid-life, 90-95% of all people are infected with Epstein-Barr Virus (EBV)

    • True

    • False

    Correct Answer
    A. True
    Explanation
    The given statement is true. Epstein-Barr Virus (EBV) is a common virus that infects the majority of people by mid-life. It is estimated that 90-95% of individuals are infected with EBV by this stage. EBV is primarily transmitted through saliva and can cause various illnesses, including infectious mononucleosis (mono). While most people infected with EBV do not experience any symptoms or only have mild symptoms, the virus can lead to more severe complications in some individuals, such as certain types of cancer.

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  • 20. 

    Which of the following is likely to accumulate in the brain and spinal cord?

    • Defective virus

    • DNA virus

    • Prion

    • Non enveloped virus

    Correct Answer
    A. Prion
    Explanation
    Prions are likely to accumulate in the brain and spinal cord. Prions are misfolded proteins that can cause other normal proteins to also misfold, leading to the accumulation of abnormal proteins in the brain and spinal cord. This accumulation can result in neurodegenerative diseases such as Creutzfeldt-Jakob disease and mad cow disease. Unlike viruses, prions do not have DNA or RNA, and they are not enveloped. Therefore, prions have a higher likelihood of accumulating in the brain and spinal cord compared to the other options listed.

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  • 21. 

    Replication of DNA viruses typically occurs in the:

    • Golgi

    • Cytoplasm

    • Nucles

    • ER

    Correct Answer
    A. Nucles
    Explanation
    The correct answer is nucleus. Replication of DNA viruses typically occurs in the nucleus of the host cell. This is because the DNA of the virus needs to access the host cell's machinery for replication, transcription, and translation, which are all processes that primarily occur in the nucleus. The nucleus also provides a protected environment for the replication process, ensuring the integrity of the viral DNA.

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  • 22. 

    Parvoviruses only cause disease in animals.

    • True

    • False

    Correct Answer
    A. False
    Explanation
    Causes distemper in cats, enteric disease in dogs, fatal cardiac infection in puppies
    B19 cause of erythema infectiosum (fifth disease); rash of childhood

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  • 23. 

    Antigenic SHIFT (recombination of whole genes or DNA segments) is what causes pandemics with Influenza A

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Antigenic shift refers to the recombination of whole genes or DNA segments in the Influenza A virus. This process can lead to the emergence of new strains of the virus that are significantly different from previous strains, making them more likely to cause pandemics. This is because the human immune system may have limited or no pre-existing immunity to these new strains, allowing them to spread rapidly and cause widespread illness. Therefore, the statement that antigenic shift causes pandemics with Influenza A is true.

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  • 24. 

    Hyper angina is best described by which of the following conditions?

    • Caused by enterovirus 71 and coxsackievirus type A16

    • Sudden onset of fever with vesicles on tonsils and palate

    • Caused by replication of rhinoviruses

    • None of the above

    Correct Answer
    A. Sudden onset of fever with vesicles on tonsils and palate
    Explanation
    enterovirus 71 and coxsackievirus type A16 cause hand foot and mouth disease

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  • 25. 

    Rhinovirus can infect with which of the following conditions

    • Aerosol and direct contact

    • Fecal oral route

    • Small inoculum

    • A & C

    • Insect bite

    Correct Answer
    A. A & C
    Explanation
    Rhinovirus can infect through aerosol and direct contact, as well as with a small inoculum. This means that the virus can be transmitted through respiratory droplets in the air, as well as through direct contact with infected surfaces or individuals. Additionally, even a small amount of the virus can lead to infection. Therefore, the correct answer is A & C.

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  • 26. 

    Flaviviridae may be the most likely cause of which of the following

    • Encephalitis

    • West nile

    • Dengue fever

    • A & B

    • B & C

    Correct Answer
    A. A & B
    Explanation
    Flaviviridae is a family of viruses that includes the West Nile virus and several other viruses that can cause encephalitis. Encephalitis is inflammation of the brain, and both West Nile virus and Flaviviridae are known to be common causes of this condition. Therefore, the correct answer is A & B, as Flaviviridae may be the most likely cause of encephalitis and West Nile virus. Dengue fever, another disease caused by Flaviviridae, is not specifically mentioned in the question as a likely cause of encephalitis.

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  • 27. 

    Interferons are best described by which of the following?

    • Beta interferons produced by leukocytes

    • Induced by viruses only

    • Inhibit protein synthesis mechanisms

    • Gamma interferon is induced by fibroblasts and T cells

    Correct Answer
    A. Inhibit protein synthesis mechanisms
    Explanation
    Interferons are proteins that are produced by cells in response to viral infections. They play a crucial role in the immune response by inhibiting the replication of viruses and regulating the immune system. One of the main functions of interferons is to inhibit protein synthesis mechanisms in infected cells, preventing the virus from replicating and spreading. This helps to limit the viral infection and promote the immune response against the virus.

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  • 28. 

    Which of the following is true about arboviruses?

    • Excludes bunyaviridae

    • Can cause asymptomatic infection

    • Spread by aerosols

    • Rarely spread by insect bites

    Correct Answer
    A. Can cause asymptomatic infection
    Explanation
    Arboviruses can cause asymptomatic infections, meaning that individuals infected with these viruses may not show any symptoms. This is one of the characteristics of arboviruses, along with their ability to be transmitted through arthropod vectors like mosquitoes and ticks. The answer choice "can cause asymptomatic infection" accurately describes this characteristic of arboviruses.

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  • 29. 

    HSV-2 can only be spread when lesions are visible.

    • True

    • False

    Correct Answer
    A. False
    Explanation
    active lesions most significant source; genital herpes can be transmitted in the absence of lesions

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  • 30. 

    Viruses can survive outside of the cell.

    • True

    • False

    Correct Answer
    A. False
    Explanation
    Viruses are obligate intracellular pathogens. They lack metabolic and protein synthesis machinery.

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  • 31. 

    Match the following terms with the definitions below: Host Range, Susceptibility.1. The capacity of a cell, tissue, or species to support virus replication - qualitatative measurement - number of receptor molecules and ability of host cell to support virus replciation.2. The cells, tissues, species that a virus can productively infect - absolute measurement - determined by receptor availability for virus binding/entry and presence of intracellular cell factors to support virus replication.

    • Host Range = 1, Susceptibility = 2.

    • Susceptibility = 1, Host Range = 2.

    • The definitions provided do not match the terms given.

    Correct Answer
    A. Susceptibility = 1, Host Range = 2.
    Explanation
    The correct answer is Susceptibility = 1, Host Range = 2. This is because the first definition provided matches the term "Susceptibility," which refers to the capacity of a cell, tissue, or species to support virus replication. The second definition matches the term "Host Range," which refers to the cells, tissues, or species that a virus can productively infect. Therefore, the correct match is Susceptibility = 1 and Host Range = 2.

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  • 32. 

    Enveloped viruses may enter the host cell through:

    • Fusion with plasma membrane.

    • Penetration through plasma membrane.

    Correct Answer
    A. Fusion with plasma membrane.
    Explanation
    Enveloped viruses have a lipid envelope surrounding their protein coat. This envelope allows them to fuse with the host cell's plasma membrane, enabling the virus to enter the cell. Fusion with the plasma membrane is a common mechanism used by enveloped viruses to gain entry into the host cell and initiate infection. Penetration through the plasma membrane is not a typical mode of entry for enveloped viruses.

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  • 33. 

    Which Influenza Envelope Proteins  assist in viral budding and release

    • Hemagglutinin (H)

    • Neuraminidase (N)

    • M2

    Correct Answer
    A. Neuraminidase (N)
    Explanation
    Neuraminidase (N) is the correct answer because it is an influenza envelope protein that assists in viral budding and release. Neuraminidase plays a crucial role in the life cycle of the influenza virus by cleaving sialic acid from host cells, allowing the newly formed viral particles to be released and spread to other cells. Hemagglutinin (H) is another influenza envelope protein, but its main function is to facilitate viral entry into host cells, not viral release. M2 is a transmembrane protein that is involved in the viral entry process, but it does not play a role in viral budding and release.

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  • 34. 

    Exposure to dengue fever serotype provides lifelong immunity

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Exposure to a specific serotype of dengue fever provides lifelong immunity because the immune system develops antibodies against that particular serotype. Once the immune system has encountered a specific serotype, it can recognize and effectively fight against it in the future. This immunity is long-lasting and protects against subsequent infections by the same serotype, providing lifelong immunity.

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  • 35. 

    Phage (virus)  mediated transfer of host DNA from one cell to another is known as

    • Transduction

    • Transformation

    • Transcription

    • Integration

    Correct Answer
    A. Transduction
    Explanation
    Transduction is the process in which a phage (virus) transfers host DNA from one cell to another. This transfer occurs when the phage infects a host cell and incorporates the host DNA into its own viral genome. When the phage then infects another host cell, it transfers this incorporated DNA, resulting in the transfer of genetic material from one cell to another. Transformation, transcription, and integration are not accurate terms for this specific process.

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  • 36. 

    Which places are the first sites of enterovirus infection

    • Intestine and oropharynx

    • Blood stream

    • Lymphatic system

    • Skin

    Correct Answer
    A. Intestine and oropharynx
    Explanation
    The correct answer is intestine and oropharynx. Enteroviruses are primarily transmitted through the fecal-oral route, meaning they enter the body through the mouth after coming into contact with contaminated feces. The intestine and oropharynx are the initial sites of infection because they are the first areas the virus encounters after ingestion. From there, the virus can potentially spread to other parts of the body, such as the blood stream, lymphatic system, and skin.

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  • 37. 

    Which of the following inhibits early steps of viral replication and helps to prevent reinfection?

    • CMI

    • Antibody response

    • Interferons

    • None of the above

    Correct Answer
    A. Antibody response
    Explanation
    The correct answer is antibody response. Antibodies are proteins produced by the immune system in response to an infection. They bind to specific viral proteins and prevent the virus from entering and infecting host cells. This inhibits the early steps of viral replication and helps to prevent reinfection. Antibodies can also neutralize viruses by blocking their ability to infect cells. Overall, the antibody response is an important defense mechanism against viral infections.

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  • 38. 

    Which is not a DNA virus ? 

    • Herpex

    • HBV

    • Adeno

    • HCV

    Correct Answer
    A. HCV
    Explanation
    HCV is not a DNA virus. It is a RNA virus. DNA viruses replicate their genetic material using DNA polymerase, while RNA viruses use RNA polymerase. Therefore, HCV, being an RNA virus, does not fit the category of DNA viruses.

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  • 39. 

    Which of the following methods of virus DX, relies on comparison of acute phase and covalescent phases titers?

    • Clinical presentation

    • Tissue cultures

    • Immunocytochemical staining of cell cultures

    • Serological studies

    Correct Answer
    A. Serological studies
    Explanation
    Serological studies involve the analysis of blood samples to detect the presence of antibodies produced by the immune system in response to a viral infection. In the case of virus DX, comparing the titers (levels) of antibodies during the acute phase (when the virus is actively replicating) and the convalescent phase (when the person is recovering) can provide valuable information. This comparison helps determine if the antibody levels have increased, indicating a recent infection, or if they have remained stable or decreased, suggesting a past infection or immunity. Therefore, serological studies are the method that relies on the comparison of acute phase and convalescent phase titers in virus DX.

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  • 40. 

    What is the core?

    • Nucleic acid and surrounding protein shell.

    • Major protein component of the shell of the core.

    • Single virus particle.

    • Membrane surrounding virus core.

    Correct Answer
    A. Nucleic acid and surrounding protein shell.
    Explanation
    The core refers to the nucleic acid and the surrounding protein shell. This means that the core of a virus consists of genetic material (nucleic acid) and a protective protein coat (protein shell). These components are essential for the replication and survival of the virus.

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  • 41. 

    Which of the following are unique viral enzymes that are targeted for treatment?

    • Interferons.

    • Reverse transcriptases.

    • Kinases.

    • Polyglycols.

    Correct Answer
    A. Reverse transcriptases.
    Explanation
    Human immunodeficiency virus type I (HIV-I) reverse transcriptase and herpes simplex virus (HSV) thymidine kinase.

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  • 42. 

     Which of the following has the largest genome of all human viruses

    • Poxvirus

    • Herpesvirus

    • Hepadnavirus

    • Adenovirus

    Correct Answer
    A. Poxvirus
    Explanation
    single linear dsDNA molecule of 130-300 kb with hairpins at either end

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  • 43. 

    Viruses can be isolated from clinical samples by cultivation in all of the following except

    • Animals

    • Embryonated eggs

    • Chemically defined media

    • Tissue culture

    Correct Answer
    A. Chemically defined media
    Explanation
    Virus can be grown only in CELLULAR medium

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  • 44. 

    Which property allows corona virus to mutate and adapt during epidemics?

    • Ingested in contaminated foods

    • MRNA synthesized in short templates

    • DNA is incorporated into hosts DNA

    • DNA polymerase jumps templates and causes erros

    Correct Answer
    A. MRNA synthesized in short templates
    Explanation
    The property that allows the coronavirus to mutate and adapt during epidemics is the synthesis of mRNA in short templates. This means that the virus can quickly generate different versions of its genetic material, allowing it to adapt to new environments and evade the immune system. By synthesizing mRNA in short templates, the virus can introduce errors and variations in its genetic code, leading to the production of different proteins and potentially new strains of the virus.

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  • 45. 

    Which of the following is the most common arbovirus induced disease worldwide?

    • Japanese encephalitis

    • West nile virus

    • Yellow fever

    • Dengue fever

    Correct Answer
    A. Dengue fever
    Explanation
    Dengue fever is the most common arbovirus-induced disease worldwide. It is caused by the dengue virus, which is transmitted to humans through the bite of infected Aedes mosquitoes. Dengue fever is prevalent in tropical and subtropical regions, particularly in urban areas. Symptoms of dengue fever include high fever, severe headache, joint and muscle pain, rash, and in severe cases, it can lead to dengue hemorrhagic fever or dengue shock syndrome. Dengue fever affects millions of people each year, making it the most widespread arbovirus-induced disease globally.

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  • 46. 

    Which of the following descriptions fit a virus that replicates through a DNA intermediate?

    • Positive sense RNA used as a template and then DNA incorporated into Host

    • Nucleic acid of the virion functions directly as mRNA

    • Needs to use RNA dependent RNA polymerase

    • A & C

    Correct Answer
    A. Positive sense RNA used as a template and then DNA incorporated into Host
    Explanation
    RNA dependent DNA polymerase

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  • 47. 

    Which of the following small poxes is most viruletn

    • Variola major

    • Variola minor

    • Neither they have the same virulency

    Correct Answer
    A. Variola major
    Explanation
    Variola major – highly virulent, caused toxemia, shock, and intravascular coagulation

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  • 48. 

    Which HSV-1 produces fever blisters, cold sores and is the most common recurrent HSV-1 infection

    • Herpes labialis

    • Herpetic gingivostomatitis

    • Herpetic keratitis

    Correct Answer
    A. Herpes labialis
    Explanation
    Herpetic gingivostomatitis – infection of oropharynx in young children; fever, sore throat, swollen lymph nodes
    Herpetic keratitis – ocular herpes – inflammation of eye; gritty feeling in the eye, conjunctivitis, sharp pain, and sensitivity to light

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  • 49. 

    Which of the following is not a herpesvirus?

    • Herpes simplex 1

    • Herpes simplex 2

    • Adenovirus

    • Varicella zoster virus

    • Epstein-Barr virus

    • Roseola

    Correct Answer
    A. Adenovirus
    Explanation
    Adenovirus is not a herpesvirus. Herpesviruses are a family of DNA viruses that cause various infections in humans. Herpes simplex 1 and 2, varicella zoster virus, Epstein-Barr virus, and roseola are all examples of herpesviruses. Adenovirus, on the other hand, belongs to the Adenoviridae family and causes respiratory and gastrointestinal infections, conjunctivitis, and other illnesses.

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  • Mar 21, 2023
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