alleryStart learning →Salivary amylases break dietary starch down into which smaller molecules?
ASucrose and fructose
BLactose and glucose
CMaltose and galactose
DMaltose and glucose
Answer & Solution
Correct answer: D. Maltose and glucose
1. Starch eaten by humans is hydrolysed by enzymes, salivary amylases among them.
2. The products named are maltose and glucose.
3. Both products are consistent with the polymer, since starch is built only from glucose units.
4. Galactose and fructose are not part of starch at all, so any answer containing them cannot come from starch breakdown.
5. Cells then absorb the glucose released.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 3 "Biological Macromolecules", section 3.2 Carbohydrates_
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