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6 questions
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  • Q1
    Viruses can be transmitted through air, water, food, insect bites, and direct skin contact. Once a virus gains entry to the body, it invades a host cell in order to -
    access cellular processes for replication
    deactivate the host cell’s defenses
    synthesize antibodies for defense
    metabolize host proteins and grow
    45s
    BIOL.4c
  • Q2
    A student produces a labeled drawing of a virus for a presentation. The student states that the capsid has a function similar to the nuclear membrane found in animal cells. Which of these describes the similar function of capsids and nuclear membranes?
    Question Image
    Both transport proteins throughout the structures
    Both provide energy for activities in the structures
    Both protect genetic information for the structures
    Both code for the proteins needed for reproduction of the structures
    45s
    BIOL.4c
  • Q3
    In 1898 Friedrich Loeffler and Paul Frosch found evidence that the cause of the highly contagious hoof-and-mouth disease in livestock was a microscopic infectious particle. It was discovered that this particle requires a host cell to reproduce. Which pathogen is most likely responsible for causing hoof-and-mouth disease in livestock?
    A fungus, because it infects livestock
    A bacterium, because its contagious
    A protist, because its microscopic
    A virus, because it requires a host cell to reproduce
    60s
    BIOL.4c
  • Q4
    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?
    The rate of genetic mutation in the host is decreased due to the introduction of weakened viruses
    The immune system develops antibodies in response to the weakened viruses
    The weakened viruses attach to unaffected viruses in the host and interrupt the viral reproductive cycle
    Weakened viruses are unable to enter the host organism
    45s
    BIOL.4c
  • Q5
    Which of these describes a difference between viruses and cells?
    Cells reproduce independently, and viruses require a host to reproduce
    Cells contain protein, and viruses contain only carbohydrates
    Viruses have flagella, and cells have only cilia
    Viruses have membranes made of proteins, and cells have membranes made of nucleic acid
    45s
    BIOL.4c
  • Q6
    Severe acute respiratory syndrome (SARS) is an illness caused by a coronavirus. Symptoms including a high fever, headaches, and body aches typically occur two to seven days after infection by the virus. SARS is more serious in elderly patients. This information suggests that the reproductive cycle of the SARS virus is -
    lytic, because the virus causes respiratory illness
    lytic, because of the quick onset of symptoms after infection
    lysogenic, because the virus is a coronavirus
    lysogenic, because the virus primarily affects older people
    60s
    BIOL.4c

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