Describe what is measured as an indicator of sucrase activity and why this is an indicator of sucrase activity.

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Glucose and fructose are measured as an indicator of sucrase activity because they are a product of it.

Explanation:

Sucrase is an enzyme which catalyzes the hydrolysis of sucrose to produce fructose and glucose.

Glucose is a simple sugar that is the main source of energy and fructose is a type of sugar that can be found in vegetables and fruits. As glucose and fructose are a product of sucrase activity, measure them is an indicator of this activity.