a lipid that coats lactose molecules an ability to produce lactose internally an enzyme that catalyzes lactose breakdown a tolerance to lactose developed during childhood
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Some individuals are unable to digest the lactose found in the milk of cows. The digestive systems of these individuals most likely lack which?
Possibilities:
- a lipid that coats lactose molecules
- an ability to produce lactose internally
- an enzyme that catalyzes lactose breakdown
- a tolerance to lactose developed during childhood

an enzyme that catalyzes lactose breakdown