Starch is an important homopolysaccharide found in plants as a storage form of glucose. It is composed of repeating glucose units linked by alpha(1->4) and alpha(1->6) glycosidic bonds, forming both linear amylose and highly branched amylopectin. Starch provides glucose to plants and is a major carbohydrate in the human diet, playing an important role as an energy source.

1. HOMOPOLYSACCHARIDE
STARCH
Shruthi shree gandhi.s
I MSC.BIOCHEMISTRY

2. STARCH
OCCURANCE
⚫Starch is found in plants and plant sources such as
potato , barley , wheat , maize,rice,cassava.

3. STRUCTURE
ALPHA(1->6)

4. STRUCTURE
⚫starch is an branched homo polysaccharide.
(contains same type of monomers)
⚫Starch is made up of repeating units of
alpha-d-glucose monomers linked via alpha (1->4) and
alpha (1->6) glycosidic linkages.
⚫Starch is made up of combination of both amylose
and amylopectin

5. Amylose
⚫It is made up alpha glucose monomers linked via
alpha (1->4) glycosidic bond.
⚫The presence of alpha (1->4)glycosidic bond is
responsible for the coiled and compact structure of
starch.

7. Amylopectin
⚫It is made up of alpha glucose monomers joined via
alpha (1->4) and alpha (1->6) glycosidic bonds.
⚫The presence of alpha(1->6)glycosidic bond is
responsible for the branching structure of starch.

10. BIOLOGICAL FUNCTIONS
⚫It is the most common carbohydrate in human diet.
⚫Starch is the storage form of glucose in plants. the
plants utilize the glucose by using enzymes like
amylase.

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