Indicate whether each of the following statements about polysaccharides is True
ID: 23240 • Letter: I
Question
Indicate whether each of the following statements about polysaccharides is True or False. Indicate whether each of the following statements about polysaccharides is True or False Polysaccharidesare long polymers made of many nucleotides that have been joined through dehydration synthesis. Cellulose is the main storage polysaccharide in plants while glycogen is an important storage polysaccharide in many animals. Both starch and glycogen are composed of a-glucose subunits. Starch is composed of amylose and amylopectin, which are unbranched and branched chains of a-glucose subunits, respectively. Like amylopectin, glycogen is insoluble in water, but it has a longer average chain length and fewer branches. Although some polysaccharides are used to store energy, others serve as structural material for cells. The principal structural polysaccharide in plants is starch. Cellulose is composed of a long, branched chain of beta-glucose subunits. The starch-hydrolyzing enzymes produced by most organisms cannot break the bond between two alpha-glucose subunits because they only recognize beta linkages. Chitin is a structural polysaccharide found in the exoskeleton of arthropods and the cell wall of many fungi.Explanation / Answer
1. Polysaccharides are long polymers made of many nucleotides that have been joined through dehydration synthesis. False : Polysaccharides are made up of monosaccharides units.
2. Cellulose is the main storage polysaccharide in plants while glycogen is an important storage polysaccharide in many animals. False : Starch is main storage polysaccharide in plants.
3. Both starch and glycogen are composed of -glucose subunits. True
4. Starch is composed of amylose and amylopectin, which are unbranched and branched chains of -glucose subunits, respectively. True
5. Like amylopectin, glycogen is insoluble in water, but it has a longer average chain length and fewer branches. False: Glycogen is soluble in water.
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.False. Cellulose is the principal structural polysaccharide in plants.
8. Cellulose is composed of a long, branched chain of -glucose subunits. True
9. The starch-hydrolyzing enzymes produced by most organisms cannot break the bond between two -glucose subunits because they only recognize linkages. False : They recognise alpha-subunits.
10. Chitin is a structural polysaccharide found in the exoskeleton of arthropods and the cell wall of many fungi. True