What is the primary structural difference between Amylose and Amylopectin components of plant Starch? (Hard)
Answer and explanation
Correct answer: A. Amylose is unbranched while amylopectin has alpha-1,6 branches
- Step 1: Starch consists of ~20% amylose and ~80% amylopectin. Step 2. Amylose is a linear helical polymer linked solely by alpha-1,4-glycosidic bonds; amylopectin is highly branched, featuring alpha-1,6-glycosidic branch points every 24-30 glucose residues. Answer: Amylose is unbranched with alpha-1,4 bonds, whereas Amylopectin is branched with alpha-1,4 and alpha-1,6 bonds. Why not the others: Beta-1,4 bonds form cellulose; both contain only D-glucose; amylose is soluble in hot water.
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