Enzymatic Breakdown

where does the breakdown of carbohydrates occur?

• mouth, stomach, pancreas, and small intestines

• mouth, pancreas, and small intestines

• mouth and small intestines

• only in the pancreas

Answer explanation

Starch breaks down in the mouth as salivary amylase, than is broken down by pancreatic amylase in the pancreas into disaccharides (maltose, sucrose, lactose). In the small intestines the carbohydrates are broken down into their simplest form - monosaccharides. Maltose is broken down into glucose + glucose (maltase), sucrose is broken down into glucose + fructose (sucrase), and lactose (lactase) is broken down into glucose + galactose.

what are the brush border enzymes?

• lactose, sucrose, maltose

• lactase, sucrase, maltase

• lactase, fructose, and sucrose

• galactose, fructose, maltose

where does the breakdown of protein occur?

• mouth, pancreas, stomach

• stomach, pancreas, small intestines

• mouth and pancreas

• only in the small intestines

Answer explanation

Breakdown of protein starts in the stomach. Pepsinogen is produced by chief cells which comes in contact with hydrochloric acid becoming pepsin. That pepsin breaks down the proteins into polypeptides. The enzyme that breaks down proteins in the pancreas is trypsin and chymotrypsin which breaks down into dipeptides. As the final product, the small intestines break down protein into it's final product with peptidase.

where does lipid (fat) digestion occur?

• mouth, pancreas, and small intestines

• small intestines

• pancreas

• stomach and pancreas

Answer explanation

Bile is secreted to emulsify fat into micelles. Which is just taking the bigger fat and breaking it down to smaller fat. Lipase is an enzyme from the pancreas that will secrete into the intestines to break fat down into its final product which is fatty acids and glycerol.

in protein digestion, what is the solution used to determine protein digestion?

• 5% pancreatin solution

• Benedict's solution

• iodine solution

• hydrochloric acid

what pancreatic enzymes are involved in protein digestion?

• trypsin

• pancreatic lipase

• chymotrypsin

• pancreatic amylase

what solution is used to determine carbohydrate digestion (starch)?

• Benedict's solution

• 5% pancreatin solution

• iodine

• blood

what solution is used to determine the presence of fat digestion?

• hemoglobin

• iodine

• 5% pancreatin solution

• Benedict's solution

what pancreatic enzyme facilitated the digestion of fat?

• pancreatic amylase

• pancreatic lipase

• chymotrypsin

• trypsin

describe the changes that occur with the egg experiment?