Aim: What are the molecules of life?
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1 Aim: What are the molecules of life? Do Now: List the elements & compounds cycled through ecosystems. Homework: Read pp P. 63 # 1,2,3,4,5 Vocabulary: Carbohydrate, lipid, protein, amino acid, nucleic acid, nucleotide, DNA, RNA, ATP. Valence electrons, Covalent bonds, molecules, monosaccharide, polysaccharide,
2 All Living Organisms Require Organic Molecules Sugars are the building blocks of Carbohydrates Examples: Glucose (monosaccharide) Fructose (monosaccaride) Sucrose (disaccharide) table sugar A. Carbohydrates 1. Structure formed from carbon, hydrogen, & oxygen C atoms bond to each other to form chains or rings a nutrient from plants/ producers two simple sugars (monosaccharide glucose) can link to form a di or poly saccharide (sucrose) 2. Function major source of energy for organisms provide structural support ex: Chitin (insect exoskeleton) & cellulose (plants) Glucose Molecule
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5 Aim: What are lipids? 11/12/09 Do Now : Copy these notes 1. Structure chains of carbon atoms bonded to each other and to hydrogen atoms> Lipids repel water 2. Function storing energy> fat molecules are converted from carbs & back to carbs if needed when food not available controlling water movement> makes up the cell membrane, "Phospholipid bilayer" 1 layer made of water, 1 made of long carbon chains, repels water lipid bilayer gives the membranes its fluid characteristics ex: Feathers of birds coated with oils help "waterproof" them The presence of the double bond prevents tight packing and makes the bilayer difficult to freeze.
6 Brown Paper Bab Lipid Test 11/12/09 LE3, LE5
7 Class Notes LE5 11/12/09
8 Phospholipid Bilayer Polar molecules cannot pass through this membrane without external aid
9 Aim: What are the molecules of life (cont.): Proteins & Nucleic Acids Do Now: 11/16/09 What are the building blocks of carbohydrates? What is the role of lipids in our bodies? Homework Use pp P. 63 # 6, 7
10 Proteins They rule your lives! Definition: chains of amino acids that twist & fold into certain shapes that determine what the proteins do Example: Some proteins provide structure & support (Muscle Tissue) Some proteins carry out important chemical reactions in the body (they break down food in your digestive system) Structure large molecule made of amino acids (aa) there are 20 essential aa's recognized by its amino group ( NH2) & carboxyl group ( COOH) Must have nitrogen to make amino acids aa's link together by peptide bonds to get aa's your body must take in proteins Enzymes are Proteins
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12 Nucleic Acids Definition: Made of smaller units called nucleotides Nucleotide: Contains 3 parts a sugar, a base & a phosphate group Nucleic Acids: your body has only 2: DNA & RNA DNA sugar is deoxy ribose Deoxyribonucleic acid RNA sugar is ribose Ribonucleic acid 4 Nucleotide bases of DNA : A,T,C,G Adenine (A) Thymine (T) Cytosine (C) Guanine (G) 4 RNA Nucleotide Bases: A,U, C, G Adenine (A) Uracil (U) Cytosine (C) Guanine (G)
13 Functions of Nucleic Acids & Nucleotides Function Heredity Energy Transfer Description DNA stores & transmits genetic info. between organisms DNA molecule contains the genetic code/ instructions for producing all the proteins in an organism ATP is the main molecule that cells use to transfer energy ATP = Adenosine triphosphate Consists of a single nucleotide connected to two additional phosphate groups There are other energy transferring molecules that also contain nucleotides
14 carbohydrates DNA enzymes fats lipids monosaccharides nucleic acids nucleotides phospholipids polysaccharides proteins RNA
15 Review of Biomolecules
October 13, Biochemistry.notebook. Nov 10 12:03 AM. Nov 22 9:45 AM. Nov 22 8:57 AM. Nov 22 8:34 AM. Aim: What are the molecules of life?
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Biochemistry.notebook. October 18, Oct 4 10:25 AM. Nov 23 8:14 AM. Aim: What are the molecules that make up living organisms?
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