1. Carols first question was, “What is an enzyme” a. Use the enzyme lactase as an example, and explain how it functions(figure 4.1) b. What is the substrate for lactase. c. What are the end products of this reaction? 4. Lactose Intolerance (Enzymes)Carol was recovering from a terrible bout with the flu, having been sick for nearly twoweeks. As she was getting her strength back, her appetite also improved. In fact, afternot eating very much for almost two weeks, Carol was famished. But somethingstrange happened to her: When she began eating milk products after the illness,she experienced terrible abdominal distress-she had bloating, pain, and diarrhea.Carol went to see her doctor and explained her symptoms. Her doctor said that thevirus she contracted must have affected the enzyme-producing cells in her small intes-tine. Carol had become lactose intolerant. Whenever she ate any food containing milk,her digestive system was unable to break down the sugar in the food or beverage. Herdoctor suggested that Carol stay away from dairy products, except for yogurt.Last night Carol saw you studying your biology textbook in the library, and sheasked you to explain some things to her. EnzymeSubstrateEnd ProductEnd product bindsto allosteric siteand changes shapeof active sitoAllosteric siteSubstrateActivesiteEnzyme(a)(b)End product bindsto active sitebiocking substrate(c)Figure 4.1. Enzyme regulation.

Answered: Image /qna-images/answer/b337dad9-3b5b-42be-a777-bc21239cd023.jpg

1. Carols first question was, “What is an enzyme” a. Use the enzyme lactase as an example, and explain how it functions(figure 4.1) b. What is the substrate for lactase. c. What are the end products of this reaction?

1. Carols first question was, “What is an enzyme” a. Use the enzyme lactase as an example, and explain how it functions(figure 4.1) b. What is the substrate for lactase. c. What are the end products of this reaction?

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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Question

4. Lactose Intolerance (Enzymes)
Carol was recovering from a terrible bout with the flu, having been sick for nearly two
weeks. As she was getting her strength back, her appetite also improved. In fact, after
not eating very much for almost two weeks, Carol was famished. But something
strange happened to her: When she began eating milk products after the illness,
she experienced terrible abdominal distress-she had bloating, pain, and diarrhea.
Carol went to see her doctor and explained her symptoms. Her doctor said that the
virus she contracted must have affected the enzyme-producing cells in her small intes-
tine. Carol had become lactose intolerant. Whenever she ate any food containing milk,
her digestive system was unable to break down the sugar in the food or beverage. Her
doctor suggested that Carol stay away from dairy products, except for yogurt.
Last night Carol saw you studying your biology textbook in the library, and she
asked you to explain some things to her.

Enzyme
Substrate
End Product
End product binds
to allosteric site
and changes shape
of active sito
Allosteric site
Substrate
Active
site
Enzyme
(a)(b)
End product binds
to active site
biocking substrate
(c)
Figure 4.1. Enzyme regulation.

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