Which of the following is NOT an example of chemical digestion a) stomach acid deconstructs proteins into amino acids
b) saliva breaks down complex carbohydrates into simple sugars
c) peristaltic contractions in the stomach churn a food bolus into liquid chyme
d) bile in the small intestine breaks down fats into glycerol and fatty acid chains

HELP ME!

c) peristaltic contractions in the stomach churn a food bolus into liquid chyme

Explanation:

Chemical digestion describes the breakdown of substances into smaller components by chemicals.

The stomach acid breaks down proteins into their subunits - amino acids. The saliva breaks down long molecules of carbohydrates to sugar monomers. The bile in the small intestine digests fat molecules into their components - glycerol and fatty acid chains.

Peristaltic contractions move and churn the food in the stomach to form liquid, but this process does not describe the chemical breakdown of substances.