The human saliva contains an enzyme called salivary ______ that breaks down starch, a complex molecule, into sugar.

amylase

The correct answer is Option (2) –amylase

The human saliva contains an enzyme called salivary amylase that breaks down starch, a complex molecule, into sugar.

Explanation:

• Amylase is an enzyme that specifically targets the breakdown of complex carbohydrates, such as starch, into simpler sugars like maltose.
• Salivary amylase is produced in the salivary glands and released into the mouth, where it begins the digestion of starch in the food during the chewing process.
• Lipase, peptidase, and protease are enzymes involved in the digestion of lipids and proteins, respectively, but they are not primarily responsible for breaking down starch.