Answer:
13. is Option J) all of the above
and 14 I'm not completely sure but I think its option D.
Chemical composition and physical properties
protein digestion begins when you first start chewing. there are two enzymes in your salvia called amylase and lipase. they most break down carbohydrates and fats. Once a protein source reaches your stomach, hydrochloric acid enzymes called proteases break it down into smaller chains of amino acids
