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Amylose and amylopectin are both forms of starch, but they differ because:
AAmylose is branched and amylopectin is unbranched
BAmylose is unbranched and amylopectin is branched
CAmylose holds fructose and amylopectin holds glucose
DAmylose holds glucose and amylopectin holds fructose
Answer & Solution
Correct answer: B. Amylose is unbranched and amylopectin is branched
1. Both are polysaccharides of glucose monomers, so the monomer is not the difference.
2. Amylose is formed by unbranched chains carrying only alpha 1-4 linkages.
3. Amylopectin carries alpha 1-6 linkages at branch points, so it is a branched polysaccharide.
4. Options C and D are traps: neither form is built from fructose.
_Source: OpenStax Biology for AP(R) Courses (CC BY 4.0), Ch 3 'Biological Macromolecules', sections 3.1-3.5_
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