Biochemistry (121)

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South University *

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232

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Biology

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Nov 24, 2024

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Chapter 1 Biochemistry and the Unity of Life 1 2 C) paralysis toxins and red blood cell poisons. D) All of the above. E) None of the above. 41 Which of the following is released by the upper intestine and increases zymogen secretion? A) secritin B) pepsin C) cholecystekinin D) bile salts E) enteropeptidiase 42 What is the advantage in synthesizing enzymes as zymogens? A) It allows them to be packaged in chyomicrons more easily. B) Zymogens can be stored for rapid release when needed. C) Depending on the zymogen, it can be activated by the low pH in the stomach or the high pH in the intestine. D) Zymogens are resistant to inactivation by kinases. E) Diet pills can be designed to inhibit zymogen hydrolysis. Short-Answer Questions 43 How are dietary proteins, carbohydrates, and lipids digested? 44 How is the release of pancreatic enzymes coordinated with digestion in the stomach? 45 Why is the acidification of the stomach juices important for digestion of proteins? 46 What would happen if an enzyme mutation occurred that seriously inhibited the activity of amylase? 47 What is the role of cholesterol in digestion? 48 What is a limit dextrin?
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