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Wake-up 1.What are the monomers of proteins? 1.What macromolecule is the only one that has the element Phosphorus? 1.Explain the term Biological Catalyst.
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EOC Review #1: Biochemistry and Enzymes Christopherson
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What is Biochemistry? Chemistry of living organisms
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Basic Elements of Life Remember: CHNOPS C = Carbon H = Hydrogen N = Nitrogen O = OxygenP = Phosphorus S = Sulfur
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Monomer Single molecule One subunit Example: Single bead for a necklace
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Polymer Many molecules More than one subunit Example: Beads making up a necklace
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Four Macromolecules: 1. Carbohydrates (Sugars and Starches)
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Carbohydrate Also known as: Sugars and starches Elements present: How many of each element are present? C, H, O C=6, H=12, O=6 Ratio – 1:2:1
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Monomer of a Carbohydrate Simple Sugar or Monosaccharide
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Type of Carb: Monosaccharide Explanation: One sugar / Simple Sugar Example: Glucose – sugar created in photosynthesis and broken down in cell respiration
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Simple Sugar Indicator: Benedict’s
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Positive Test: Turns Green, Yellow, Orange, or Red (depends on amount of sugar)
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Type of Carb: Polysaccharide Explanation: Many Sugars
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Example of a Polysaccharide Starch: Plants; stored energy
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Example of a Polysaccharides Cellulose: Plants; Structure
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Example of a Polysaccharide Glycogen: Animals; stored energy
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Carbohydrate Functions #1 Immediate energy source Burn quickly
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Carbohydrate Function #2 Stored Energy Organisms store what they don’t use
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Carbohydrate Function #3 Provide structure for plants, fungus, and arthropods
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Starch Indicator: Iodine
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Positive Test: Turns Black
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Four Macromolecules: 2. Lipids - Fats
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Lipids Also known as: Fats, Oils, and Waxes Elements present: Monomer: Polymer: C, H, O high ratios Glycerol and fatty acid tails Triglyceride
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Lipids Function #1 Long term energy storage
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Lipids Function #2 Provide Insulation
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Lipids Function #3 Phospholipids: Regulate water movement in and out of the cell (cell membrane)
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Lipids Function #4 Steroids: regulate metabolism, immune response, reproduction, etc.
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Indicator: Brown Paper Bag or Towel
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Positive Test: Grease Spot
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Four Macromolecules: 3. Proteins
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Protein Elements present: C, H, O, N, and sometimes S
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Protein Monomers Amino Acid
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Protein Polymer Protein: Amino acids are held together by peptide bonds
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Protein Structure
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Proteins Function #1 Insulin (protein) helps glucose move from our bloodstream to our cells
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Proteins Function #2 Blood has hemoglobin (protein) which helps transport oxygen
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Protein Function - #3 Enzymes (Protein) speed up and control chemical reactions
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Proteins Function #4 Provides structure in hair, nails, and skin
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Proteins Function #5 Make up the structure and function of muscles
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Proteins Function #6 Help transport substances in and out of the cell
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Protein Indicator: Biuret’s
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Positive Test: Turns Purple
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Four Macromolecules: 4. Nucleic Acids
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Nucleic Acids Elements present: Monomer: C,H,O,N, P Nucleotide
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Nucleic Acid Function #1 Usable form of energy (ATP)
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Nucleic Acid Function #2 Responsible for an organisms genetic make-up (DNA)
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Nucleic Acid – Function #3 Makes Proteins: RNA
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What do you know? Answer the questions listed on the review sheet. Make sure that you are using the correct test.
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Enzymes Christopherson
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Enzymes Review Enzymes are proteins; made up of amino acids held together by peptide bonds
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Enzymes Review Regulates the chemical reactions of the cell;
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Enzymes Review End in –ase For example: Lactase
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Enzyme Characteristics #1 Biological Catalysts; Catalysts speed up chemical reactions
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What is a Catalyst? Lowers the activation energy; energy needed to start a chemical reaction
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Enzymes Characteristics #2 Have an active site; binding site for substrates; makes them site specific
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How Enzymes Work Enzyme; Catalyst Substrate; Reactant Active Site Product Enzyme-Substrate Complex 1. Substrate matched the active site of the enzyme 2. Enzyme-substrate complex forms; Enzyme molds around the substrate for a reaction 3. Enzyme releases the product; Enzyme remains unchanged. 1 22 3
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Environmental Effects on Enzymes 1.Temperature*Temperature* High Temperatures can denature enzymes Denature means lose shape (active site).
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Environmental Effects on Enzymes 1.Temperature Low Temperatures cause enzymes to move slowly Decreasing enzyme activity
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Environmental Effects on Enzymes 2. pH Dramatic changes in the pH of a solution can denature an enzyme Decreasing enzyme activity
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pH scale 114 768 Acid Base Strong Acid Strong Base Weak Acid Weak Base Neutral
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Effects on Enzymes 3. Amount of substrate
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