Principles Of Biology 1 (Evolution & Viruses)
4. All viruses are made up of two components. What are they?
Answer: A protein capsid and genetic material, in the form of either RNA or DNA.
3. Which of the following is a characteristic of all living things?
Answer: All living things maintain a constant internal environment.
7. What is the correct sequence of events in viral reproduction?
Answer: Attachment, penetration, biosynthesis, maturation and release.
5. How are flu viruses named? Check all that may apply.
Answer: By their hosts, By their type (A or B), By their strain.
1. Label the image below to evaluate your knowledge of virus structure.
Answer: Capsid, Spike, DNA or RNA, Envelope
2. Which of these is the best description of a virus?
Answer: Chemical complexes of RNA or DNA protected by a protein shell.
13.In most organisms, the flow of information is from.
Answer: DNA, RNA, then Protein.
8. Which of the following types of cells would a flu virus most likely target as the means of entry into the body?
Answer: Epithelial cells lining the respiratory system.
12.Getting a flu vaccine guarantees individuals will not get the flu.
Answer: False.
6. In order to infect a cell, a virus must.
Answer: Have a special protein on its surface that can interact with a protein receptor on the surface of the host cell.
10.Select all of the following ways that the flu virus may impact body systems.
Answer: The breakdown of muscle fibers and accumulation of fluid cause muscle and joint achiness, The restriction of blood vessels in the skin conserves heat and results in chills, The abundance of cytokines signals the hypothalamus to increase body temperature, resulting in a fever, Appetite centers in the brain show reduced action, resulting in a loss of appetite and nausea.
9. Which of the following best describes how the flu virus may impact the respiratory system.
Answer: The proteins produced by the virus interfere with ability of epithelial cells to move materials in and out of lung tissue, resulting in fluid buildup in the lungs.
11.Which of the following structures are associated with the immune system. Check all that may apply.
Answer: Thymus, Spleen, Red bone marrow, Lymph nodes.
