Which is the repeating unit that makes up starch?

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Study with the DAT Bootcamp Molecules and Fundamentals of Biology test. Use flashcards and multiple choice questions with hints and explanations to prepare effectively.

Multiple Choice

Which is the repeating unit that makes up starch?

Explanation:
Starch is built from many units of glucose linked together by alpha-glycosidic bonds, so the repeating unit is glucose. In plants, starch consists of α-D-glucose monomers connected mainly by α-1,4 bonds in the chains and α-1,6 bonds at branch points in amylopectin. Fructose is a different sugar (a ketohexose) not used to form starch polymers; galactose and mannose are hexoses that differ in the orientation of hydroxyl groups and are not the repeating units in starch.

Starch is built from many units of glucose linked together by alpha-glycosidic bonds, so the repeating unit is glucose. In plants, starch consists of α-D-glucose monomers connected mainly by α-1,4 bonds in the chains and α-1,6 bonds at branch points in amylopectin. Fructose is a different sugar (a ketohexose) not used to form starch polymers; galactose and mannose are hexoses that differ in the orientation of hydroxyl groups and are not the repeating units in starch.

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