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A 65-year-old man expresses his concern about developing colon cancer to his physician. He states that his father as well as grandmother died of colon cancer. After performing a physical exam and observing unremarkable colonoscopy, the physician recommends a diet low in fat and high in fiber. The physician explains that studies have shown a decreased risk of colon cancer with insoluble fiber consumption. Which of the following bonds is responsible for the fiber’s inability to be digested?

A. α (1->4)

B. α (1->6)

C. β (1->4)

D. β (1->6)

E. α (1->2)

Check the answer at

http://usmle.biochemistryformedics.com/role-of-dietary-fibre/

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