Among the options provided, "Pancreatic Amylase digests carbohydrates" is the one that primarily takes place in the duodenum.
Here's a brief overview of each option in relation to their locations:
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Pancreatic Amylase digests carbohydrates - This enzyme is secreted by the pancreas into the duodenum, where it continues the digestion of carbohydrates that began in the mouth and stomach.
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Pepsin digests proteins - Pepsin is active in the stomach, not the duodenum. It works in the acidic environment of the stomach to break down proteins.
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Normal flora bacteria produce gases - Normal flora bacteria are primarily found in the large intestine (colon), not specifically in the duodenum.
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Lingual Lipase digests fats - Lingual lipase begins the digestion of fats in the mouth and continues to function in the stomach, but it is not exclusive to the duodenum.
Therefore, the correct answer is Pancreatic Amylase digests carbohydrates.