Question

The percentage amylose in starch is about

• A. 40-50 %
• B. 80-85 %
• C. 60-80 %
• D. 50-60 %
• E. 15-20 %

Hint:

Amylose makes up about 15-20% of starch and is responsible for its helical structure.

Answer 1

Answer: (E)

Starch is a polysaccharide made up of glucose units and consists of two main components: amylose and amylopectin. Amylose is a linear polymer of glucose, while amylopectin has a branched structure. On average, amylose makes up about 15-20% of starch, while the remaining 80-85% is amylopectin. 
Thus, the correct answer is \( \boxed{15-20\%} \), corresponding to option (E).