BSC 114 Lecture Notes - Lecture 7: Phospholipid, Glycerol, Hydrophile

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graysardine594

24 Mar 2016

School

University of Alabama

Department

Biological Sciences

Course

BSC 114

Professor

Steven Marcus

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Document Summary

A disaccharide is formed when a dehydration reaction joins two monosaccharides. This covalent bond is called a glycosidic linkage. Typically consist of a few hundred to several thousand monosaccharides linked together. Plants store surplus starch as granules within chloroplasts and other plastids. Humans and other vertebrates (animals with backbones) store glycogen mainly in liver and muscle cells. Serve as building material for structures protecting cells or whole organisms. Cellulose is a major component of the tough walls that enclose plant cells (fiber) Like starch, cellulose is a polymer of glucose, but the glycosidic linkages differ. In straight structures, hydroxyl groups can form hydrogen bonds. Chitin is a structural polysaccharide found in the exoskeletons of arthropods. It also provides structural support for the cell walls of many fungi. Chitin"s properties as a flexible and strong material make it favorable as a surgical thread. Enzyme that digest starch by hydrolyzing alpha linkages can"t hydrolyze beta linkages in cellulose.

Related Questions

Can somebody check if my answer is rght? Thank you

Complex carbohydrates

Indicate whether each of the following statements about polysaccharides is True or False.

1. Polysaccharides are long polymers made of many nucleotides that have been joined through dehydration synthesis. False
2. Cellulose is the main storage polysaccharide in plants while glycogen is an important storage polysaccharide in many animals. False
3. Both starch and glycogen are composed of Î±-glucose subunits. True
4. Starch is composed of amylose and amylopectin, which are unbranched and branched chains of Î±-glucose subunits, respectively. False
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 Î²-glucose subunits. True
9. The starch-hydrolyzing enzymes produced by most organisms cannot break the bond between two Î± -glucose subunits because they only recognize Î² linkages. False
10. Chitin is a structural polysaccharide found in the exoskeleton of arthropods and the cell wall of many fungi. True

please i need help with this qustions answer the multiple choice that is all and be clear not writes un clear stuff just asnswer the qustions please

Question 1

Starch is: (select all the correct answers)

an energy storage carbohydrate in plants

an energy storage carbohydrate in animals

a structural carbohydrate in plants

a polymer of glucose

Question 2

The monomers in starch are joined together by which type of linkage?

beta 1-4 glycosidic linkage

alpha 1-4 glycosidic linkage

alpha 1-6 glycosidic linkage

Question 3