Question

Students in biology are studying the macromolecules of life. They used a calorimeter to determine the calories in various types of food. Once the lab was completed, the students ate the left over food samples. Monica commented that in just 6 or 7 "chews" of the saltine, it was gone; nothing but a sticky paste in her mouth. Elaborate on what happened chemically while chewing the saltine. Include the macromolecules present. A) The saltine is made of flour, a carbohydrate. The flour dissolved in the saliva found in Monica's mouth, which is mostly water. B) The saltine is mostly flour, a carbohydrate. The bonds of the carbohydrate were broken down by an enzyme in Monica's mouth, which is a protein. C) The saltine is a combination of carbohydrate and lipid; enzymes or proteins in Monica's digestive tract broken down the bonds of the two macromolecules in the saltine. D) Three macromolecules are represented. The saltine is a carbohydrate. Nucleic acids direct digestion. Digestion took place in Monica's mouth thanks to enzymes or proteins.

Answer 1

Answer:D

Step-by-step explanation:

The answer is D

Answer 2

Answer:

Option (A).

Step-by-step explanation:

Digestion may be defined as the process of breakdown of large food particles into simpler substances that can be absorbed by the body. Digestive system includes the gastrointestinal tract and associated digestive glands.

Monica has eaten saltine. Saltine contains the wheat flour that are made of carbohydrate. The saliva produced in mouth helps in the digestion of carbohydrate.  Saliva contains large amount of water that dissolves the flour and amylase enzymes break down the carbohydrates into simple sugars.

Thus, the correct answer is option (A).