enzymes

• What color does iodine turn in the presence of starch?

  Blue-black
• What is the purpose of putting a drop of iodine in each well of a spotting tile?

  To test for the presence of starch
• What is the independent variable in the experiment involving amylase and starch?

  The concentration of the buffer solution
• How is the solution of amylase, starch, and buffer warmed in the experiment?

  Using a water bath or electric heater
• What indicates that starch has been completely broken down in the experiment?


  The iodine solution remains brown
• What should be done at regular points during the experiment?

  Take drops of the solution and place them in the wells
• What happens to the iodine solution when starch is no longer present?

  It remains brown instead of turning blue-black