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5.1 Demonstration of the action of the enzyme catalase
Watch the video and then answer the following questions.
1. Which of the following is/are the control variable(s) in Practical 5.1?
(1) size and shape of the liver cubes
(2) volume of the hydrogen peroxide solution and distilled water
(3) volume of gas collected in each test tube
A. (1) only
B. (2) only
C. (1) and (2) only
D. (1) and (3) only
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