Final answer:
Amylase is the digestive enzyme commonly tested for in the laboratory. It helps to digest starch and other carbohydrates.
Step-by-step explanation:
The digestive enzyme commonly tested for in the laboratory is amylase. Amylase helps to digest starch and other carbohydrates. It is produced in the salivary glands and the pancreas. During digestion, amylase breaks down the complex carbohydrates into simpler sugars, such as glucose.