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Starch

OCR AS-level BiologyBiological MoleculesLesson 20 of 63

Starch is an energy storage polysaccharide found in plants. Starch grains occur in seeds and storage organs such as potato tubers.

Starch is made of chains of alpha glucose monosaccharides linked by glycosidic bonds.

Starch is made of amylose and amylopectin.

Diagram

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Key terms in this lesson

glycosidic bond
The covalent bond formed between two monosaccharides by a condensation reaction.

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