Chemical digestion of ______ begins in the stomach.Multiple choice question.nucleic acids and proteinsprotein and fatsugar and vitamins

1. ### Break Down the Problem

We need to identify which type of macromolecule begins its chemical digestion in the stomach from the given options.

2. ### Relevant Concepts

• The stomach primarily functions in the digestion of proteins due to the presence of gastric juices that include pepsin.
• Other macromolecules like carbohydrates (sugars) start digestion in the mouth and fats are mainly digested in the small intestine.

3. ### Analysis and Detail

1. Nucleic Acids and Proteins: Nucleic acids are not primarily processed in the stomach.
2. Protein and Fats: Proteins are broken down in the stomach, while fats are digested later.
3. Sugar and Vitamins: Sugars (carbohydrates) begin digesting in the mouth, not the stomach.

4. ### Verify and Summarize

Among the options, "protein and fats" is the only one where protein digestion begins in the stomach.

Final Answer

Protein and fats - Chemical digestion of proteins begins in the stomach.