1. Maltose, trehalose, and cellobiose are all disaccharides of glucose that differ in the nature of...
1. Maltose, trehalose, and cellobiose are all disaccharides of glucose that differ in the nature of the glycosidic bond attaching the two glucosyl residues. In maltose, the linkage is α(1→4); in trehalose, the linkage is α(1→1); in cellobiose the linkage is β(1→4). Based upon this information,which of these disaccharides is a non-reducing sugar? Explain your reasoning. Which of these disaccharides results from the breakdown of cellulose? Explain your reasoning. Which of these disaccharides results from the breakdown of amylose? Explain your reasoning.
Homework Answers
(a) Trehalose is a non-reducing sugar.
Explanation: If that anomeric has an OH-group, then it is a reducing sugar. This is because when the sugar is in the open configuration, that alcohol becomes a ketone or aldehyde which is able to reduce other compounds.
But here, in the trehalose, there is no OH-group present at the anomeric carbon due to α(1→1) glycoside linkage. Hence, trehalose is a non-reducing sugar.
(b) Cellobiose results from the breakdown of cellulose.
Explanation: Cellulose is a polymer of glucose molecules connected by β(1→4) glycosidic linkage. Hence, the breakdown of which results in the disaccharide containing β(1→4) glycosidic linkage, i.e. cellobiose.
(c) Maltose results from the breakdown of amylose.
Explanation: Amylose is a polymer of glucose molecules connected by α(1→4) glycosidic linkage. Hence, the breakdown of which results in the disaccharide containing α(1→4) glycosidic linkage, i.e. maltose.
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1. Maltose, trehalose, and cellobiose are all disaccharides of
glucose that differ in the nature of...
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10. (15 pts) Answer the following questions about two disaccharides, (a) maltose, or malt sugar. and...
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points)
2. According to the paper, what is the major disadvantage of
relying on glycolysis during high-intensity exercise? (5
points)
3. Using Figure 1 in the paper, briefly describe the different
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1. According to the paper, what does lactate dehydrogenase
(LDH) do and what does it allow to happen within the myofiber? (5
points)
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points)
3. Using Figure 1 in the paper, briefly describe the different
sources of ATP production at 50% versus 90% AND explain whether you
believe this depiction of ATP production applies to a Type IIX
myofiber in a human....
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