PIMSO 2022 - Science - Grade 4 - National Round Question 3
PIMSO Science · PIMSO 2022 - Science - Grade 4 - National Round
A majority of the Asian population suffer lactose intolerance due to decrease in the production of lactase in the small intestine, which digests the lactose sugar found in dairy products. Therefore, people with lactose intolerance suffer stomach pain, bloating, and diarrhea. How is that so?
The undigested lactose causes the symptoms directly.
The undigested lactose irritates the lining of the small intestine.
The undigested lactose reacts with fiber in the large intestine.
The undigested lactose is digested by the gut bacteria instead.
The undigested lactose attracts water and solutes to fecal material.