Name any four enzymes present in the intestinal juice, the substances they act upon and their end products.

Hint: Digestive enzymes break down polymeric macromolecules into smaller building pieces, allowing the body to absorb them.
Digestive enzymes break down food into smaller molecules, which are then employed for a range of metabolic processes by your tissues, cells, and organs. This process takes some time and produces amino acids, glycerol, fatty acids, and simple sugars. Enzymes produced in various sections of your digestive system finish the job when you chew and break food into small pieces.

Complete answer:
Intestinal juice is a clear to pale yellow, watery secretion made up of hormones, digestive enzymes, mucus, and neutralising chemicals that are secreted by the glands and mucous membrane lining of the small and large intestines. Intestinal juice helps digestion and absorption by neutralising hydrochloric acid from the stomach, releasing gastrointestinal hormones into the bloodstream, and containing digestive enzymes.
The enzymes found in intestinal juice are as follows:
1. Disaccharidases are also known as maltases. Maltose is converted to glucose via maltases.
Dipeptidases are enzymes that break down dipeptides into simpler amino acids.
2. Lipases are enzymes that transform fatty acids and glycerols from diglycerides and monoglycerides.
3. Nucleosidases: Nucleosides, sugars, and bases are converted into nucleosides, sugars, and bases by nucleosidases.
4. Lactases are enzymes that convert lactose into simple glucose.

Note:
Digestive enzymes are essential for breaking down the food we consume. The gastrointestinal tract is where you'll find them. To aid in the digestion of food, salivary glands and cells lining the stomach, pancreas, and small intestine release these substances.
The digestive enzymes accomplish this by breaking down the huge, complex molecules that make up proteins, carbs, and lipids into smaller molecules, allowing the nutrients in these foods to be easily absorbed and transported throughout the body.