Multiple choice

What is the product of digestion formed in mouth by the action of the enzyme ptyalin on starch?

  1. Polypeptide

  2. Glucose

  3. Maltose

  4. Fructose

  5. Glycerol
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The saliva contains ptyalin or salivary amylase, which starts degrading the starch where the chain is linear. It is an enzyme that breaks the bond joining two sugars together, and forms fragments of soluble starches. It then breaks these down further, and the final product is a unit of two glucose molecules known as maltose. This substance is then broken down to glucose in the intestine.

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