Starch is composed of amylose and ___________.A. AmylopectinB. MaltoseC. GlycogenD. None of the above

Starch is primarily composed of two types of polysaccharides: amylose and amylopectin. Here’s a breakdown of each option:

A. Amylopectin: This is the correct answer. Amylopectin is a branched polymer of glucose that, together with amylose, makes up starch. Starch consists of approximately 20-30% amylose and 70-80% amylopectin.

B. Maltose: This is a disaccharide made up of two glucose molecules. It is not a component of starch but rather a product of starch breakdown during digestion.

C. Glycogen: This is a polysaccharide similar to starch but is used for energy storage in animals. It is not a component of starch.

D. None of the above: This option is incorrect since amylopectin is indeed part of starch.

Conclusion:
The correct answer is A. Amylopectin.