Other questions in this quiz

2. What does a host cell do

  • Viruses enter the host cell and 'hijack' the cells mechanisms for making DNA and proteins, and make copies of themselves
  • Collect gravy from the supermarket
  • surround every cell you will study
  • Absorb water from the body and inject it into cells that are lacking in water

3. what is an open blind trial

  • the patient becomes blind/severely blind due to vaccination
  • when the patient and doctor both know the treatment. This type of trial happens when there is no other treatment and the patients are so ill that doctors believe they will not recover from their illnesses
  • when one group called the test group is given the new drug being trialled. the results are compared with the control group. one control group receives existing treatment the other control group receives a placebo

4. What do different types of white blood cells do

  • Carry oxygen to the heart
  • Some engulf and digest invading microorganisms and others produce antibodies which recognize and destroy invading microorganisms
  • contain hemoglobin — a red, iron-rich protein that gives blood its red color. Hemoglobin enables red blood cells to carry oxygen from your lungs to all parts of your body and to carry carbon dioxide from other parts of the body to your lungs so that
  • Destroy red blood cells

5. why is it very hard to produce a permanent vaccine for viruses

  • because they mutate quickly, and this changes their surface proteins
  • because their antigens change shape very quickly
  • because they are too big to control

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