Biology Unit 1 Quiz

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1. Which of these is not a stage in causing cholera?

  • Water moves out of the cell into the gut, causing diarrhoea
  • The bacterium lays dormant in a tubercle for years
  • The Cl- move from the cell into the gut, lowering the water potential
  • The bacterium releases a toxin which open the Cl- channels
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2. Which of these statements about the cardic cycle is false?

  • Semi lunar valves are in the arteries
  • Cardiac output = heart rate x stroke volume
  • The pulmonary vein goes to the lungs
  • The atria contract in atrial systole

3. How do you measure the size of a cell?

  • Use a ruler
  • Use a stage graticule to calibrate an eyepiece graticule
  • Use an eyepiece graticule to calibrate a stage graticule
  • Put a line piece of paper underneath the cell under a microscope

4. What difference is there the second ultracentrifugion?

  • Spin it faster
  • Increase Temperature
  • Increase Concentration
  • Decrease pH

5. Define Antigen.

  • White blood cell with a large nucleus responsible for the immune response
  • Disease causing microorganism
  • Protein on the surface of a foreign cell, which causes an immune response
  • A cell that remains in the blood allowing a faster, more rapid resonse next time

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Madddie

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Sucrose is not a reducing sugar. Fructose is a reducing sugar. 

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