HW #5 - AP Biology Period 4 Liem Nguyen 9/19/09 Homework #5...

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AP Biology Period – 4 Liem Nguyen 9/19/09 Homework #5 (090925): Chapter 5 (due Friday 090925 ) Total points: 40 for Attempt on all questions Concept Map: 10 points 1. List the four major classes of macromolecules. The four major classes of macromolecules are carbohydrates, lipids, proteins, and nucleic acids. They are named macromolecules for their giant sizes. 2. Distinguish between monomers and polymers. A polymer is a long molecule having many similar or identical building blocks connected by covalent bonds. The repeating units that are the building blocks of the polymer are the small molecules, monomers. 3. Draw diagrams to illustrate condensation and hydrolysis reactions. Condensation reaction is specifically a dehydration reaction, which two molecules are covalently bonded to each other through loss of small molecule (water). Hydrolysis reaction is the reverse of condensation reaction, which bonds are broken by the addition of water molecules. (p. 69)
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4. Distinguish among monosaccharides, disaccharides, and polysaccharides. Monosaccharides (simple sugars) are the simplest carbohydrates. Disaccharides are double sugars, having two monosaccharides joined by condensation reaction. Polysaccharides are carbohydrate macromolecules, polymers made of many sugar building blocks. 5. Describe the formation of a glycosidic linkage. Glycosidic linkage is a covalent bond formed between two monosaccharides by a condensation or dehydration reaction. A glycosidic linkage creates a disaccharide. 6. Distinguish between the glycosidic linkages found in starch and cellulose. Explain why the difference is biologically important. The glycosidic linkages differ in ring structures. In starch, glucose monomers are in the alpha configuration, and in cellulose, glucose monomers are in the beta configuration. The differing glycosidic linkages cause a starch molecule to be helical, and a cellulose molecule to be straight, allowing for tough plant cell walls. 7.
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This note was uploaded on 11/06/2011 for the course AP BIO 101 taught by Professor Chan during the Fall '05 term at JFK.

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HW #5 - AP Biology Period 4 Liem Nguyen 9/19/09 Homework #5...

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