Final answer:
Digestion begins in the mouth where the salivary enzyme amylase breaks down the starch in bread into shorter units. Due to stomach acid, carbohydrate digestion stops in the stomach. Digestion of the shorter units continues in the small intestine where pancreatic amylase breaks them down into the disaccharide maltose, which is then broken down to two glucose units by maltase. The jelly contains the disaccharide sucrose, and milk contains the disaccharide lactose. These carbohydrates are digested in the small intestine where the carbohydrate in jelly is broken down by sucrase to glucose and fructose, and the carbohydrate in milk is broken down by lactase to glucose and galactose.
Step-by-step explanation:
Digestion of carbohydrates begins in the mouth, where the salivary enzyme amylase initiates the breakdown of starch in bread into shorter units. Stomach acid halts carbohydrate digestion temporarily in the stomach. The small intestine takes over the process, where pancreatic amylase continues breaking down the shorter units into the disaccharide maltose. Further breakdown occurs with maltase, converting maltose into two glucose units.
The disaccharides sucrose (from jelly) and lactose (from milk) are broken down in the small intestine by sucrase and lactase, respectively, into their constituent sugars (glucose and fructose for sucrose, and glucose and galactose for lactose).
Your question is incomplete, but most probably your full question was
Sarah consumes a peanut butter and jelly sandwich and a glass of milk for lunch, and we will follow the digestion of the carbohydrates in the meal. Digestion begins in the [ Select ] where the salivary enzyme [ Select ] breaks down the [ Select ] in bread into shorter units. Due to [ Select ] , carbohydrate digestion stops in the [ Select ] . Digestion of the shorter units continues in the [ Select ] where pancreatic amylase breaks down the shorter units into the disaccharide [ Select ] , which then is broken down to two [ Select ] units by [ Select ] . The jelly contains the disaccharide [ Select ] , and milk contains the disaccharide [ Select ] . These carbohydrates are digested in the [ Select ] where the carbohydrate in jelly is broken down by [ Select ] to glucose and [ Select ] , and the carbohydrate in milk is broken down by lactase to glucose and [ Select ] .