Questions: Globally, most human adults are lactose intolerant. People with lactose intolerance produce insufficient amounts of the enzyme lactase

Globally, most human adults are lactose intolerant. People with lactose intolerance produce insufficient amounts of the enzyme lactase

Transcript text: Globally, most human adults are lactose intolerant. People with lactose intolerance produce insufficient amounts of the enzyme lactase

Solution

The answer is the second one: the enzyme lactase.

Explanation for each option:

Lactose: This is incorrect. Lactose is the sugar found in milk and dairy products. Lactose intolerance is not due to a lack of lactose but rather the inability to properly digest it.
The enzyme lactase: This is correct. Lactose intolerance occurs because the body produces insufficient amounts of lactase, the enzyme needed to break down lactose into glucose and galactose for absorption.
Vitamins: This is incorrect. While vitamins are essential nutrients, they are not directly related to the digestion of lactose.
Saliva: This is incorrect. Saliva contains enzymes like amylase that begin the digestion of carbohydrates, but it does not contain lactase, which is necessary for lactose digestion.

Summary: Globally, most human adults are lactose intolerant because they produce insufficient amounts of the enzyme lactase.

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