311C biomolecules_worksheet+A

311C biomolecules_worksheet+A - NAME_ BIO 311C Worksheet:...

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NAME____________________________________ BIO 311C Worksheet: Biomolecules 1. Draw each of the following chemical groups. a. carbonyl: - C=O b. hydroxyl: -OH c. sulfhydryl: -SH d. carboxyl: - COOH e. phosphate: -OPO 3 2- f. amino: -NH3 2. Name of the chemical reaction that breaks a polymer down to its individual monomers: Hydrolysis 3. Name of the chemical reaction used to build polymers by joining individual monomers together: . Dehydration reaction (type of condensation reaction) 4. Name the monomers used to build each of the following macromolecules: a. Lipids: None, lipids are not polymers b. Carbohydrates: monosaccharides c. Proteins: amino acids d. Nucleic Acids: nucleotides 5. List the major functions of the carbohydrates. energy storage; structural support, cell communication (recognition) 6. Draw a straight chain aldohexose. Which chemical groups are always found in a straight chain sugar? O OH OH OH OH HC – CH – CH – CH – CH – CH2OH Carbonyl (CO) and hydroxyls (OH). In aldohexose: carbonyl on C#1, hydroxyl on each of the five other carbons. 7. Draw a straight chain ketohexose, a structural isomer of the aldohexose above. What are structural isomers? OH O OH OH OH H2C – C – CH – CH – CH – CH2OH In ketohexose: carbonyl on C#2, hydroxyl on each of the five other carbons. Structural isomers: save atoms but with different covalent arrangement/partners. 8. What is the name of the covalent bond that links carbohydrate monomers? Between which chemical groups does it form? Glycosidic linkage between –OH on one sugar (in ring form) and –OH on another sugar (in ring form) 9. Using the figure shown at right as a reference: (a) draw 2 molecules of β -glucose joined by a 1,4 β linkage see below (b) draw 2 molecules of α -glucose joined by a 1, 4 α linkage see below (c) Write the molecular formula for each disaccharide drawn above α glucose – α glucose: C12H22O11 β glucose – β glucose: C12H22O11 (d) What is the significance to most animals if carbohydrate monomers are connected by α or β linkages? ONLY HAVE ENZYMES TO HYDROLYZE ALPHA LINKAGES – CANNOT DIGEST BETA 1,4 GLYCOSIDICLINKAGES
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(e) Which linkages are found in: starch? __ α 1, 4 AND α 1,6 _______ glycogen? __ α 1, 4 AND α 1,6 _______________ cellulose? ____ β 1, 4 __________ 10. List the major functions of the different types of lipids (triglycerides, phospholipids and steroids). Triglycerides: energy storage, cushioning; phospholipids: membrane structure; steroids: membrane structure, cell communication
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This note was uploaded on 04/02/2012 for the course BIO 311C taught by Professor Satasivian during the Spring '08 term at University of Texas at Austin.

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311C biomolecules_worksheet+A - NAME_ BIO 311C Worksheet:...

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