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Chapter 5, Campbell
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Composed of long chains of smaller moleculesMacromolecules are formed through the process of_____________ .Polymerization = large compounds are built by joining smaller ones togetherSmall units (_____________) form larger units (______________)There are four groups of organic compounds found in living things…
polymerization
monomerspolymers
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1.
2.
3.
4.
Carbohydrates
Lipids
Proteins
Nucleic Acids
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“AKA” condensation reactionDehydrate = lose waterSynthesis = to join or makeMonomers are combinedH2O released
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Form of digestionHydrate = to waterysis = process of With the breaking of bonds, water molecules are added to each smaller molecule
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“AKA” sugars or carbsChemical compounds that contain__________, __________, and ____________ .The three elements exist in a 1:2:1 ratio Empirical vs molecular formula Organisms use carbohydrates as a primary source of ____________________ .Plants use carbohydrates for ________________ .
carbon hydrogenoxygen
fuel (energy)
structural support
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Monosaccharide = simple sugarsSmall in size & easily diffuse into and out of the cellThere are three monosaccharides;
1. Glucose2. Fructose3. Galactose
Products of the following chemical reactions:
PhotosynthesisDigestionConversion of fats & proteins
Organism uses:Fuel for respirationBuilding larger sugars
Monosaccharides link together forming two –sugar
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Disaccharide = a sugar made from the combination of two monosaccharidesDisaccharides are water-soluble, but cannot diffuse into or out of the cellThere are three disaccharides in your home:
1. Sucrose = Glucose + Fructose (table sugar)2. Lactose = Glucose + Galactose (milk sugar)3. Maltose = Glucose + Glucose (cereal)
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Polysaccharides = “giant” sugar made from the combination of 3 or more monosaccharides“AKA” starchesLarge insoluble molecules that cannot diffuse into or out of a cellUsed for long – term energy storage or structural support purposesMajor bio – starches include
GlycogenAmyloseCellulose
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Amylose = surplus glucose storage in chloroplastsCellulose = structural glucose that forms the cell wall in plant cells
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Glycogen = storage starch for an organisms supply of glucoseGlygogen is highly branched, many strandsAnimals store glycogen a one – day supply of glycogen in the liver and musclesChitin = starch that forms the exoskeleton of arthropods and insectsChitin also forms the cell walls of various fungi
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Organic polymers that contain carbon, hydrogen, oxygen and nitrogenFormed from the bonding of monomer building blocks called amino acidsUsed in the protective skin and muscle tissue of animalsAlso used as enzyme catalysts in both plants and animals
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Building blocks for proteinsSmall molecules that can easily diffuse into and out of the cellIntegral to the formation and copying of DNA20 different amino acids are divided into two categories
1. Essential = must be ingested (9)2. Non-Essential = can be produced in the
body
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Amino acids are built like a sandwichOne slice of bread must be an amine groupThe other slice must be a carboxyl groupIn this image the large red structures represent the R group of the Amino acid. The R group represents an organic variable. This organic molecule is different in each of the 20 amino acids and determines their behavior.
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During the dehydration synthesis of two monomers, a peptide bond formsPeptide bond is a covalent bond that links amino acids together to create proteins.Polypeptide = bonding together of numerous amino acidsProteins are composed of polypeptides in various bond structures
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Unique sequence of amino acidsSingle polypeptide chain of amino acidsMistakes in sequence and structure will result in a failure to complete functionPrimary structure is determined through genetic inheritance
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A mistake in the reading sequence of amino acids in a polypeptide results in the change in shape of the human RBCSickle cell anemia
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Results from hydrogen bond inserted between peptide bonds at regular intervals along the amino acid sequenceThis alternation of bonding forms a coil or helix shape or a pleated sheet (folded paper)
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Determined by interactions among functional groups of amino acids along the peptide bond chainFunctional group interactions produce hydrophobic regions and van der Waalsinteractions
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Results from the bonding or combination of two or more polypeptide chainsAmino acids form a super coil of bond between the various chainsStructure of these proteins similar to braided rope and is very strong
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Any change in shape, structure, & function of a proteinThe protein is now biologically inactiveThe protein is said to be “denatured”Causes of Denaturing:
Alteration of pHChanges in solute concentrationChanges in environmental conditionsTemperature changes
Some proteins may renature, other cannot
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Macromolecule monomer containing H, O, N, C, and PNucleotides = 5-carbon sugar combined with a phosphate group and nitrogenous baseNucleic acids store and transmit genetic info1. Ribonucleic Acid
(RNA)2. Deoxyribonucleic
Acid (DNA)
Nitrogenous Base
Five – Carbon Sugar
Phosphate
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DNA is composed of four nitrogenous basesThe bases are represented by a letter1) Adenine (A)2) Guanine (G)3) Cytosine (C)4) Thymine (T)
The four bases are divided into two classifications based on their chemical structure1) Purines = have two rings of carbon (A & G)2) Pyrimidines = have only one carbon ring (T & C)
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Adenine
Guanine Cytosine
Thymine
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Purines Pyrimidines
Adenine Guanine
Cytosine Thymine
Phosphate groupDeoxyribose
A
T
G
C
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Hydrogen bonds
Nucleotide
Sugar-phosphate backbone
Key
Adenine (A)
Thymine (T)
Cytosine (C)
Guanine (G)
DNAA with TG with C
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“AKA” fatsChemical compounds that contain carbon, hydrogen, and oxygenHydrogen and Oxygen could exist in a many:1 ratioAre the macromolecule exception in that they are not polymersLipids are formed from smaller molecules through dehydration reactionsAny fat is constructed from two sub –units
GlycerolFatty acids
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Glycerol consists of a 3 - carbon skeleton with a hydroxyl group attachedFatty acid consists of a carboxyl group attached to a long carbon skeleton, often 16 to 18 carbons longJoined through dehydration synethesis
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tri
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Solid at room temp.Found in animal productsThe hydrocarbon tail of this lipid has carbon atoms saturated with hydrogen at each bond siteContains no double or triple bonds between carbon atoms
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Liquids at room temp.Found in plant & fish oils & legumesThe carbons are notsaturated with hydrogen bondsMay contain one or more double or triple bonds between carbon atoms
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Animals:Energy storageWaterproof coveringsInsulationCushioning of organsCell membranes
Plants:Oils for seed dispersionCell membranes
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Phospholipids = major components of cell membranes of various organismsPhospholipids have two fatty acids attached to glycerol & a phosphate group at the third positionThe phosphate group carries a negative charge giving the molecule polarityPhospholipids interaction with water determine what can and cannot pass the cell membrane
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The fatty acid tail is hydrophobic (repels H2O)Phosphate head group is hydrophilic (loves H2O)As phospholipids are added to water, they self-assemble with the hydrophobic tails pointing toward the center and the hydrophilic heads on the outside
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At the surface of a cell phospholipids are arranged as a bilayerThe arrangement of heads & tails creates a bilayer between the cell and its external environment
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Fat-based molecule composed of four fused carbon rings and a functional groupChemical basis of many animal hormonesHuman hormones include:
Cholesterol = nerve cell functionTestosterone = male sexual hormoneEstrogen & Progesterone = female sexual hormones