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Lipids and Carbohydrates: Linear vs. Branched Polysaccharides
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<strong>Lipids and Carbohydrates:</strong> Linear vs. Branched
Polysaccharides
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Polysaccharides can be distinguished by the amount of branching
that occurs. Linear starches tend to form hydrogen bonds between
the chains. How does branching relate to the function of those
starches?
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In the models below, click the "Run" button and use the slider to change
the temperature. You can compare the strength of attraction between
linear polymers in the fiber, such as cellulose, and the branching
polysaccharide like starch, at different temperatures. This explains why
starch is edible and wood isn't, no matter how long you boil it.
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Branched polysaccharides can be more easily separated into individual
chains than linear polysaccharides like cellulose. This is explained by:
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<html>the tight fit that can occur between branched molecules.
<html>the increased number of covalent bonds in linear chains.
<html>the increased number of weak interactions that can form between branched chains.</html>
<html>the increased number of weak interactions that can form between linear chains.</html>
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Based on your observations of the polysaccharides in the models, explain
why starch is edible and wood is not.
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