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Can you explain why the answer E ? And also why not A . A states that five member ring . Isn’t it should be six member ring?

Can you explain why the answer E ? And also why not A . A states that five member ring . Isn’t it should be six member ring?

Biology (MindTap Course List)
Biology (MindTap Course List)
11th Edition
ISBN:9781337392938
Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Chapter3: The Chemistry Of Life: Organic Compounds
Section: Chapter Questions
Problem 5TYU: A monosaccharide designated as an aldehyde sugar contains (a) a terminal carboxyl group (b) an...
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Can you explain why the answer E ? And also why not A . A states that five member ring . Isn’t it should be six member ring?
1. Regarding cyclic structures of monosaccharides and cyclitols, such as myo-inositol shown below, the following is FALSE: 2. HO. OH OH OH OH OH A. Some hexoses exist in the five-membered ring (hexofuranose) form. B. In aqueous solutions, equilibrium exists between five- and six-membered ring structures. C. In aqueous solutions, equilibrium exists between - and -hexopyranoses. D. In aqueous solutions, monosaccharides exist in equilibrium between the cyclic and linear open-chain forms. НО myo-inositol E. In aqueous solutions, cyclitols, such myo-inositol, exist in equilibrium between the cyclic and linear open-chain forms. F. Carbocyclic analogs of monosaccharides, such as myo-inositol (see above), are much more chemically and metabolically stable than monosaccharides. HO Lactulose, a -glycoside that is not hydrolyzed by amylases, is used for treatment of portal encephalopathy. This condition is caused by an elevated level of ammonia in the brain due to liver cirrhosis. What is the mechanism of lactulose action? НО OH EX OH OH OH OH
Transcribed Image Text:1. Regarding cyclic structures of monosaccharides and cyclitols, such as myo-inositol shown below, the following is FALSE: 2. HO. OH OH OH OH OH A. Some hexoses exist in the five-membered ring (hexofuranose) form. B. In aqueous solutions, equilibrium exists between five- and six-membered ring structures. C. In aqueous solutions, equilibrium exists between - and -hexopyranoses. D. In aqueous solutions, monosaccharides exist in equilibrium between the cyclic and linear open-chain forms. НО myo-inositol E. In aqueous solutions, cyclitols, such myo-inositol, exist in equilibrium between the cyclic and linear open-chain forms. F. Carbocyclic analogs of monosaccharides, such as myo-inositol (see above), are much more chemically and metabolically stable than monosaccharides. HO Lactulose, a -glycoside that is not hydrolyzed by amylases, is used for treatment of portal encephalopathy. This condition is caused by an elevated level of ammonia in the brain due to liver cirrhosis. What is the mechanism of lactulose action? НО OH EX OH OH OH OH
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