Carbohydrates (OCR A-Level Biology A): Flashcards

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Carbohydrates
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3 main functions of carbohydrates

Energy sources, energy stores, structural components

Elements in carbohydrates & H:O ratio

C, H, O with H:O ratio of 2:1

α-glucose vs β-glucose: -OH position on C1

α-glucose: -OH below ring; β-glucose: -OH above ring

What occurs in a condensation reaction?

Water removed, glycosidic bond forms between monosaccharides

Monosaccharides that form maltose

Glucose + glucose

Benedict's test positive result colour

Blue → green → yellow → orange → brick red

Two molecules that make up starch

Amylose and amylopectin

Iodine test positive result for starch

Blue-black colour

Glycogen vs starch branching

Glycogen more branched than starch

Monomer of cellulose

β-glucose

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