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Standard XII
Chemistry
Starch
Starch is com...
Question
Starch is composed of amylose and ________ .
A
amylopectin
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B
maltose
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C
glycogen
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D
none of the above
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Solution
The correct option is
A
amylopectin
Starch has two types of units, Amylose and amylopectin.
Amylose-Amylose is a polysaccharide made of
α
-D-glucose units, bonded to each other through
α
(
1
,
4
)
glycosidic bonds.
Amylopectin- Amylopectin is a water-soluble polysaccharide and highly branched polymer of α-glucose units found in plants
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Similar questions
Q.
Which of the following statement(s) is/are incorrect?
I. Cellulose is a polysaccharide composed of a large number of
β
-D-glucose units.
II.
β
-D-glucose units in cellulose are joined by
β
-glycosidic linkages.
III. Starch is a mixture of amylose and amylopectin.
IV. Amylose is a branched chain polysaccharide.
V. Amylopectin is a linear polysaccharide.
Q.
Assertion :Starch is a polymer of glucose. Reason: Starch is a reserve food of plants and has two components (i) amylose- a branched polymer of glucose (ii) amylopectin- an unbranched polymer of glucose.
Q.
Starch is a mixture of two components, a water soluble component amylose(15-20%) and a water insoluble component amylopectin (80-85%). The aqueous solution of amylose gives a blue colour with iodine solution due to the formation of:
Q.
Amylose is a polymer of
Q.
The glycosidic linkage involved in linking the glucose units in amylose part of starch is:
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