Science & Nature · 2
What is the name of the enzyme that breaks down lactose?
Answer
Lactase
Lactase is a hydrolytic enzyme produced by epithelial cells in the small intestine that catalyzes the breakdown of lactose (a disaccharide) into glucose and galactose. This enzymatic reaction allows humans to digest milk and dairy products. Lactase production is typically highest in infants and early childhood, with levels declining in many populations after weaning—a condition called lactase non-persistence. Geographic variation in lactase persistence reflects evolutionary adaptation to dairy farming in populations with long histories of milk consumption.
💡 Did you know?
About 65% of humans lose the ability to produce lactase after childhood, causing lactose intolerance when consuming dairy.
Other options people guess
- Protease
- Amylase
- Lipase
Topics
- biochemistry
- enzymes
- digestion
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