5
QuizMultiple Choice

The Digestive and Excretory Systems — Quiz

Question 5 • Biology

Which statement best describes the breakdown of food in the digestive system?

Answer
A
Carbohydrate digestion starts in the stomach and protein digestion starts in the stomach.
B
Carbohydrate digestion starts in the mouth and protein digestion starts in the stomach.
C
Carbohydrate digestion starts in the small intestine and protein digestion starts in the esophagus.
D
Carbohydrate digestion starts in the esophagus and protein digestion starts in the small intestine.

Explanation

Carbohydrate digestion begins in the mouth, where salivary amylase starts breaking down starch. Protein digestion begins in the stomach, where acid and enzymes such as pepsin break proteins into smaller pieces. Therefore, the statement that carbohydrate digestion starts in the mouth and protein digestion starts in the stomach is correct.

AI-written and checked against the verified answer.

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