Question

indicate whether each statement about polysaccharides is true or false.

1. polysaccharides are long polymers made of many nucleotides that have been joined through dehydration synthesis. true
2. cellulose is the main storage polysaccharide in plants while glycogen is an important storage polysaccharide in many animals. true
3. both starch and glycogen are composed of α-glucose subunits. true
4. starch is composed of amylose and amylopectin, which are unbranched and branched chains of α-glucose subunits, respectively. true
5. like amylopectin, glycogen is insoluble in water, but it has a longer average chain length and fewer branches. true
6. although some polysaccharides are used to store energy, others serve as structural material for cells. true
7. the principal structural polysaccharide in plants is starch. true
8. cellulose is composed of a long, branched chain of β-glucose subunits. true

Explanation:

To determine the correct answers, we analyze each statement about polysaccharides:

1.

Polysaccharides are polymers of monosaccharides (not nucleotides; nucleotides form nucleic acids).

Answer:

False

2.

Cellulose is a structural polysaccharide in plants (for cell walls), while starch is the main storage polysaccharide in plants. Glycogen is the storage polysaccharide in animals.