Question

people who are lactose intolerant lack the enzyme lactase. what is the most likely result of this?
they can only digest small amounts of lactose in each meal.
protease enzymes in the digestive system will breakdown lactose.
enzymes that work on lipids will also work on lactose so theres no effect.
they cant digest lactose at all if they arent producing any lactase.

Explanation:

Lactose intolerant people lack lactase. Lactase is needed to digest lactose. If no lactase is produced, lactose can't be digested. Let's analyze each option:

• Option 1: If they lack lactase, they can't digest lactose, not just small amounts. So this is incorrect.
• Option 2: Protease enzymes break down proteins, not lactose. So this is incorrect.
• Option 3: Enzymes are specific; lipid - digesting enzymes don't act on lactose. So this is incorrect.
• Option 4: Since lactase is required to digest lactose, without lactase production, lactose can't be digested. This matches the situation of lactose - intolerant people.

Answer:

They can't digest lactose at all if they aren't producing any lactase.