Carbon Compounds and Chem Reactions and Enzymes

Proteins a function of proteins involved in almost

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Unformatted text preview: ree fatty acid molecules fatty acid glycerol Glycerol Three Fatty Acids I. Proteins A. Function of Proteins – involved in almost everything and organism does 1. 2. 3. 4. 5. 6. 7. Structural proteins – part of connective tissue Storage proteins – albumin, casein milk protein Transport proteins - Hemoglobin Signaling proteins – hormones, receptors Movement – contractile proteins Defensive proteins – antibodies Enzymes – digestive enzymes I. Proteins (continued 2) B. Contain carbon, hydrogen, oxygen, nitrogen and often sulfur. 1. Made of long chains of amino acids a. b. there are 20 different amino acids Almost unlimited possibility of combinations 2. Basic structure of an amino acid I. Proteins (3) C. Amino acids are 1.connected by dehydration synthesis 2. broken apart by hydrolysis Largest Protein • the largest to date is titin a protein found in skeletal muscle; it contains some 27,000 amino acids in a single chain Enzymes (organic catalysts) • Enzymes are large complex proteins • The principal regulator of most chemical activity in living systems • Not changed during the reaction, can be reused. – each chemical reaction requires a specific enzyme – enzymes modify the rate of reaction • rate of enzyme action – varies according to pH, temperature, amount of enzyme & substrate The shape of the enzyme determines the function • Enzymes are proteins • Proteins are long amino acid chains • These chains fold up to make a specific shape. • The specific shape determines the funciton A Protein Amino acids Effect of Enzymes Reaction pathway without enzyme Activation energy without enzyme Reactants Reaction pathway with enzyme Activation energy with enzyme Products Figure 2-19 Chemical Reactions Chemical Reactions Energy-Absorbing Reaction Energy-Releasing Reaction Activation energy Products Activation energy...
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This document was uploaded on 03/30/2014 for the course SCIENCE Living Env at Franklin D Roosevelt Senior High School.

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