Question
What is the basic structural difference between starch and cellulose?
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Answer
Starch consists of amylase and amylopectin. Amylase is a linear polymer of $\alpha-\text{D}-$ glucose while cellulose is a linear polymer of $\beta-\text{D}-$ glucose. In amylase, C - 1 of one glucose unit is connected to C - 4 of the other through $\alpha-$glycosidic linkage. However in cellulose, C - 1 of one glucose unit is connected to C - 4 of the other through $\beta-$ glycosidic linkage. Amylopectin on the other hand has highly branched structure .
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Give one structural difference between amylose and amylopectin.
Give one structural difference between amylose and amylopectin.
Match the items of Column I and Column II.
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Column I
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Column II
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(i)
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Diamond.
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(a)
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Short interval of time.
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(ii)
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Instantaneous rate.
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(b)
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Ordinarily rate of conversion is imperceptible.
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(iii)
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Average rate.
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(c)
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Long duration of time.
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What happens when $D -$ glucose is treated with the following reagents?
→- $HI$
- Bromine water
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