The most likely enzyme in which she is deficient is A. α-amylase. B. β-galactosidase (lactase).

Step 1: u000AIdentify the function of each enzyme listed in the options. u000Au002D $u005Calpha$u002Damylase breaks

Question

The most likely enzyme in which she is deficient is A. $\alpha$ -amylase. B. $\beta$ -galactosidase (lactase). C. $\alpha$ -glucosidase (maltase). D. sucrose- $\alpha$ -glucosidase (sucrase). E. $\alpha, \alpha$ -trehalase.

   The most likely enzyme in which she is deficient is
A. $\alpha$ -amylase.
B. $\beta$ -galactosidase (lactase).
C. $\alpha$ -glucosidase (maltase).
D. sucrose- $\alpha$ -glucosidase (sucrase).
E. $\alpha, \alpha$ -trehalase.

Textbook of Biochemistry: With Clinical Correlations

Thomas M. Devlin 7th Edition

Chapter 25, Problem 7

Instant Answer

Step 1

- $\alpha$-amylase breaks down starch into maltose. - $\beta$-galactosidase (lactase) breaks down lactose into glucose and galactose. - $\alpha$-glucosidase (maltase) breaks down maltose into glucose. - Sucrose-$\alpha$-glucosidase (sucrase) breaks down sucrose Show more…

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The most likely enzyme in which she is deficient is A. $\alpha$ -amylase. B. $\beta$ -galactosidase (lactase). C. $\alpha$ -glucosidase (maltase). D. sucrose- $\alpha$ -glucosidase (sucrase). E. $\alpha, \alpha$ -trehalase.

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Key Concepts

Carbohydrate Digestion

Carbohydrate digestion is the process by which complex carbohydrates are broken down into simple sugars that can be absorbed by the body. This process involves a series of enzymes, beginning in the mouth with salivary amylase and continuing in the small intestine with additional enzymes on the brush border.

Disaccharidase Enzymes

Disaccharidase enzymes are located on the brush border of the small intestine and are responsible for cleaving disaccharides into monosaccharides. Each enzyme is specific to a particular disaccharide, such as lactase for lactose, sucrase for sucrose, and maltase for maltose.

Lactase (?-galactosidase) Deficiency

Lactase deficiency, commonly known as lactose intolerance, occurs when the enzyme lactase is insufficient or absent, leading to difficulties in digesting lactose. This condition results in gastrointestinal symptoms such as bloating, gas, and diarrhea upon ingestion of dairy products.

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