Question

The complete digestion of carbohydrates, proteins and fats occurs in _______.
A. Stomach
B. Liver
C. Small intestine
D. Large intestine

Answer 1

Hint: Large insoluble food molecules are broken down into small water-soluble food molecules during digestion, allowing them to be absorbed into the watery blood plasma. Digestion is a form of catabolism that is often divided into two processes: mechanical and chemical digestion, depending on how food is broken down. Food is mixed, moved into the digestive tract, and the large molecules of food are chemically broken down into smaller molecules during digestion.

Complete solution:
As we are evaluating the options,
Option A) Stomach-is an incorrect answer because in the stomach and duodenum, three major enzymes, pepsin from the stomach and trypsin and chymotrypsin from the pancreas, break down food proteins into polypeptides, which are then broken down into amino acids by various exopeptidases and endopeptidases.
Now as we come to the next options,
Option B) Liver-is an incorrect answer because during digestion, the body extracts all of the nutrients it needs from the food you consume. Food provides the body with a variety of nutrients, including fat. The liver produces bile, a digestive juice that aids fat absorption into the bloodstream. The liver secretes bile into the small intestine, which aids in the digestion of fats and vitamins.
Option C) Small Intestine- is the correct answer because the small intestine is the primary organ for nutrient absorption. The final products of digestion, such as glucose, fructose, fatty acids, glycerol, and amino acids, are absorbed into the bloodstream and lymphatic system via the mucosa.
Now we are going to check the last option,
Option D) Large intestine- is an incorrect answer because actually, the large intestine's job is to absorb water and salts from content that hasn't been digested as food and to eliminate any waste products that have remained. The majority of digestion and absorption has already occurred by the time food combined with digestive juices enters your large intestine.
As a result, we can say that the right answer is option C-‘Small Intestine’.

Note
Carbohydrates, proteins, and fats are all broken down into their essential components in the intestine: Carbohydrates are broken down into sugars. Proteins are broken down into amino acids. Fatty acids and glycerol are formed from fats. Carbohydrates are chemically broken down in the small intestine rather than the stomach. The pancreas secretes a juice that contains enzymes that help break down carbohydrates, fats, and proteins in food. The pancreas sends digestive juice to the small intestine through ducts, which are small tubes.