Tyrannosaurus rex. Lived throughout western North America 65 mya.
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1 Tyrannosaurus rex Lived throughout western North America 65 mya. One of the largest land carnivores of all time. The largest speciemen found measues 42 feet long and 13.1 feet tall. The weight of the organism has been estimated at about 13,000 pounds. Recent biochemical studies have shown T. rex to be closely related to birds. Now believed to have traveled 11 miles per hour. Why would T. Rex have fat stores rather than large starch (glycogen) stores? xljewk 1
2 Biology Thursday/Friday November 8/9, Organism of the Day: T. Rex 2. Turn in Homework 3. Lipid Lecture Review Protein Lecture May delay until Tuesday Sugars Lecture Carbohydrate Test 40 Announcements Due Today: Building Carbohydrates Activity Due Tuesday/Wednesday: Carbohydrate Testing Lab 2
3 Review Lab/ Homework More time to review for P3 Glycosidic Linkage 3
4 Organic Molecules Big 4 4
5 Lipids include Fats & Oils For energy storage Animal fat = adipose tissue: storage, cushioning, insulating 5
6 Lipids include Cholesterol (a precursor to many hormones) Waxes: For structure Phospholipids: Cell Membrane 6
7 To Build a Fat Dehydration synthesis of one glycerol three fatty acids Note functional groups: OH = alcohol COOH = organic acid 7
8 Fat C and H make up Fatty Acid Tails Hydrophobic tails Does not dissolve in water Store lots of energy because energy storage is primarily in shared electrons of C and H 8
9 Fat Saturated All C bonds are single bonds C is as full of hydrogen atoms as possible Tails are straight so pack together solid at room temperature 9
10 Fat Unsaturated Some C bonds are double C is NOT as full of hydrogen atoms as it could be Tails are bent so do not pack together tightly (not dense) Liquid at room temperature 10
11 Phospholipids Like a fat, except one fatty acid is replaced by a phosphate group Phosphate group has oxygen Pulls on electrons Makes it negative/polar Attracts water = is hydrophilic 11
12 Lipids include Phospholipids: which make up the majority of cell membranes 12
13 Phospholipids make up cell membranes Their hydrophobic tails point inwards Their hydrophilic heads point outward. 13
14 Lipid Graphic Organizer Lipids 14
15 Disaccharides = Double Sugars For energy Built by joining two monosaccharides together by removing water = dehydration synthesis Examples: Sucrose Maltose Lactose 15
16 1 4 glycosidic linkage Glucose Glucose (a) Dehydration reaction in the synthesis of maltose Maltose 1 2 glycosidic linkage GlucoseFructose (b) Dehydration reaction in the synthesis of sucrose Sucrose 16
17 Polysaccharides = Many Sugars 17
18 Polysaccharides For storage or structure Linked via dehydration synthesis Polysaccharides may be split with the addition of water. 18
19 Polysaccharides Broken by hydrolysis 19
20 Kinds of Polysaccharides In Animals: Glycogen (food storage = animal starch ) Chiton (structure = crunchy exoskeleton stuff; cell walls of fungi) In Plants: Starch (food storage) Cellulose (structure = plant fiber = cell walls = wood) 20
21 Starch Testing Lab 21
22 Period 3 Group 1 Group 5 Matthew D Bowman Jessica C Markowitz Casey A Brink Cristen H McCann Ana M Bucy Bryce A Miller Sophie K Carson Talbot N Miller Group 2 Group 6 Cassandra R Christean Truman H Miller Kamryn H Coryell Hannah M Pratt Lauren M Cummings Albert C Ragsdale Connor W Dalton Cole K Schardein Group 3 Group 7 Carter J Daniels Conner T Vacca Alyssa L James Christian M VanWagner Ciaran M Krantz Lauren T Vchulek Lindsay B Wienkers Elizabeth N Viele Group 4 Group 8 Caroline T Lant Karen E Ware Alexander W Larsen Sabrina L. Joseph S Britt P Lee Lindquist 22
23 Period 5 Group 1 Group 5 Natalie H Allen Chase E Lehotsky Tara N Bieber Ciana L Maasen Lucas Burzycki Sienna M Mander Myron E Butler Glynnis R Marcus Group 2 Group 6 Aidan Z Carlisle Angeline P Mead Quinn H Dassel Morgan L Merillat Lucinda M DeBolt Gregory G Millican Zachary M Dinniman Erik P Nimb Group 3 Group 7 Forrest L Englin Sonia K Olson Isabella A Frawley Avery Schuelke Rory L Frieda Georgia R Seltzer Hayden S Tutty Group 4 Group 8 Oliver Godfrey Shelby W Sundquist Jade C Greer Parker R Taylor Keivan Kehlhofer Jake Sullivan Kailyn J Wise 23
24 Exit Question: What is the difference between starch and sugar? Reminders: Due Tuesday/Wednesday: Carbohydrate Testing Lab ` 24
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