Activity 1.5

Polysaccharides are long polymers made of many nucleotides that have been joined through dehydration synthesis.

• True

• False

Cellulose is the main storage polysaccharide in plants while glycogen is an important storage polysaccharide in many animals.

• True

• False

Both starch and glycogen are composed of α-glucose subunits.

• True

• False

Starch is composed of amylose and amylopectin, which are unbranched and branched chains of α-glucose subunits, respectively.

• True

• False

Like amylopectin, glycogen is insoluble in water, but it has a longer average chain length and fewer branches.

• True

• False

Although some polysaccharides are used to store energy, others serve as structural material for cells.

• True

• False

The principal structural polysaccharide in plants is starch.

• True

• False

Cellulose is composed of a long, branched chain of β-glucose subunits

• True

• False

The starch-hydrolyzing enzymes produced by most organisms cannot break the bond between two α -glucose subunits because they only recognize β linkages.

• True

• False

Chitin is a structural polysaccharide found in the exoskeleton of arthropods and the cell wall of many fungi.

• True

• False