Example analysis of biological contrast test and control test in senior high school

Control experiment: except one variable, other conditions are the same.

To verify the high efficiency of the enzyme: 1 test tube: 2ml hydrogen peroxide.

Test tube No.2: Drop 2 ml of hydrogen peroxide and 3 drops of liver grinding fluid.

Test tube 3: 2 ml of hydrogen peroxide and 3 drops of ferric chloride solution.

Handling 1, No.2 and No.3 are compared with 1 respectively. (blank control)

The comparison between No.2 and No.3 shows that the enzyme has high efficiency. (Compared with enzymes and inorganic catalysts, enzymes have high efficiency.