which of the following statements best helps justify the inclusion of test tube 5 as a control in the experiment? responses it will provide a measurement of product formation in the absence of the substrate. it will provide a measurement of product formation in the absence of the substrate. it will provide a measurement of product formation in the presence of a denatured enzyme. it will provide a measurement of product formation in the presence of a denatured enzyme. it will show the effect of doubling the amount of substrate on the rate of product formation. it will show the effect of doubling the amount of substrate on the rate of product formation. it will show the effect of increased enzyme activity on the rate of product formation.