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Biochemistry WebQuest Introduction In Biology we study the biochemical structure of living things. In this webquest you will become knowledgeable in the biochemical structure of living things. Task In this task you will view tutorials and informational websites on carbohydrates, lipids, proteins, and nucleic acids. As you view these websites you will answer the worksheet, save, and print your results. Process You will go to each of the links provided and while viewing the tutorials answer the questions. To go to the different websites click on the Step by Step links. The Chemistry of Life Go to: http://www.biocab.org/Biology.html#anchor_26 Read the chemistry of life section. You may have to scroll up or down a bit to reach it! 1. How many naturally occurring elements are there? ____________________ 2. About how many of these elements are found in living matter? ______________ 3. Which 4 are present in 97% of the molecules of living matter? 1) ______, 2) ________, 3) ________, 4) ______ 4. What are the main elements in the remaining 3%? ___________________________________ 5. Define an organic molecule. _____________________________________________________________ 6. Name the 4 main organic molecules? 1) ____________, 2) _____________, 3) _____________ 4) __________ Organic Molecules lab Acids & Bases Go to http://lrs.ed.uiuc.edu/students/erlinger/water/background/ph.html 1 View the first two sections of the page & answer the following questions 1. What is an acid & give 2 examples? 2. What is a base & give 2 examples? Carbohydrates Tutorial Click on the link provided and read the tutorial about carbohydrates. You may need to scroll up and down on the small screen at the top of the tutorial for more information. When you finish go to Step 2 Lipids. Internet Links: Carbohydrates http://www.wisc-online.com/objects/index_tj.asp?objid=AP13104 Carbohydrate Tutorial 1. Carbohydrates provide the raw fuel for ______________ ___________ ________________. 2. Give 3 examples of monosaccharides. a. b. c. 3. 4. 5. 6. _____________ is the 6 carbon sugar found in blood. _____________ is the sugar that sweetens fruit. _____________ is the sugar found in milk. Glucose can have a straight line of carbon atoms or form a _________ structure. 7. The 5 carbon sugars called pentose are used in nucleic acid synthesis are ___________________ and __________________. 8. Give 3 examples of disaccharides. a. b. c. 9. Polysaccharides include _________________, _____________, and ___________. 10. ________________ is the storage molecule made from glucose by plants. 11. ________________ is made by plants for cell wall construction. 12. Glycogen is the carbohydrate storage molecule found in ______________ and _____________. Lipids Tutorial Click on the link below and answer the questions on your sheet about lipids. When you finish the lipid portion on your worksheet go to Step 3 to view Protein tutorial. Answer the questions on your sheet about Proteins. 2 Internet Links: Lipid http://www.wisc-online.com/objects/index_tj.asp?objid=AP13204 Lipid Tutorial 1. Lipids are organic molecules that are ___________________ in water. 2. Give 3 examples of lipids. a. b. c 3. Neutral fats are also called ________________________ because they have 3 fatty acids. 4. Neutral fats 3 functions: a. b. c 5. The building blocks of neutral fat molecules are ____________ _________ __________. 6. ___________________ fatty acids originate form animal sources and are ___________ at room temperature. 7. ____________________ fats originate from plants and are _______________ at room temperature. 8. _____________________________ are the chief components of all cell membranes. 9. _____________________ helps to stabilize cell membranes and is used by the body to break down steroids. Protein Synthesis Click on the Protein link below to view the Protein tutorial. Answer the questions on your Biochemistry worksheet while viewing tutorial. After you have finished go to the Step 4 link on Nucleic Acids (DNA). Internet Links: http://www.wisc-online.com/objects/index_tj.asp?objid=AP13304 Protein Tutorial 1. Proteins make up ________ % to ________ % of cell mass. 2. Examples of proteins in an organism. a. b. c. 3 d. 3. Proteins are built from ________ common building blocks called ____________ __________. 4. The primary structure of protein is determined by the sequence of ____________ __________ connected by ___________________ bonds. Protein Structure Animation Go to http://www.stolaf.edu/people/giannini/flashanimat/proteins/protein%20structure.s wf This animation represents a protein molecule. View the animation and answer the questions 1. A protein is made up of a chain of ___________ __________. 2. After viewing the animation do you think the shape of a protein molecule is complex? Circle one: Yes or No Explain ____ ____________________________________ 3. Which of the following occurs to form a protein? (circle the correct answer) A) forms a chain of amino acids B) forms a spiral (helix) C) folds on itself (bends) D) More than one chain joins together E) all of these Enzymes Go to http://science.howstuffworks.com/cell2.htm Read the text and answer the following questions 1. What is the purpose of enzymes? 2. What type of organic molecules (carbohydrate, lipid, protein, nucleic acid) are most enzymes? 3. What does the shape of an enzyme have to do with how well the enzyme works? Scroll down to the pink graphic. 4. What is the function of the active site on the enzyme? 5. In this example the maltase enzyme is speeding up what reaction? – Fill in the answers! The breakup of ____________ into two _______________ molecules. The Maltose (a sugar) lands on the _____________ site of the enzyme. The 4