Discussion
Salivary amylase converts :
Answer: A
The key's answer is starch into glucose.
Salivary amylase (ptyalin) begins the digestion of starch in the mouth by breaking its alpha-1,4 glycosidic bonds. Strictly, the main product is maltose, a disaccharide made of two glucose units, along with dextrins, rather than free glucose, but maltose is not among the options, and the key takes the glucose-based sugar as the product.
Starch is not turned into glycogen (that is synthesis in the liver and muscle) or into fats, and starch is already a carbohydrate, so 'into carbohydrates' says nothing. In forensic work, amylase activity is the basis of presumptive tests for saliva stains.
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