organic chemistry module 4: organic chemistry. all organic compounds are made with carbon carbon has...
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Organic Chemistry
Module 4: Organic Chemistry
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All organic compounds are made with carbon
Carbon has 4 electrons available for bonding in its outer energy level.
In order to become stable, carbon atoms form 4 covalent bonds.
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Living things are mostly made of carbon compounds.
These compounds are called organic compounds and their study is called organic chemistry
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Carbon can bond with other carbon atoms as well as with many other elements.
When carbon atoms bond with each other, they can form chains or rings.
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Molecular Chains
Carbon compounds vary greatly in size. Some contain 1-2 carbon atoms, while others contain 100’s or even 1000’s of carbon atoms.
These large chains of carbons are called macromolecules
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Monomers and Polymers
The cell builds macromolecules by bonding small molecules (monomers) together to form long chains (polymers).
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Monomers and Polymers
Macromolecules are large molecules, or chains of molecules, found in the cell
AKA known as polymers
Monomers bond together to make polymers
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Organic Molecules
Molecules that contain carbon.
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4 types
1. Carbohydrates
2. Lipids
3. Proteins
4. Nucleic acids
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1. Carbohydrates
Most abundant carbon compound found in nature.
Two types are monosaccarhides (sugar) and polysaccarides (starches)
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Structure
Composed of carbon, hydrogen, and oxygen.
2 hydrogen atoms and one oxygen atom for every one carbon atom.
hydrogen
carbon
oxygen
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Monosaccharides
Simple sugars, monomers
Monomer is glucose. (table sugar)
Major source of quick energy
Elements CHO
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Monosaccharides
Test = Benedicts Positive if color changes from blue to
yellow, green, or red
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Found in…
pastafruit
honey
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HydrolysisHydrolysis
breaking a disaccharidebreaking a disaccharide water molecule splitswater molecule splits occurs during digestionoccurs during digestion
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Polysaccharides
Starches/Cellulose (makes plants sturdy and is the fiber you eat)
A chain of monosaccharides makes a polysaccharide.
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CondensationCondensation
making a disaccharidemaking a disaccharide chemical reaction linking 2 chemical reaction linking 2
monosaccharidesmonosaccharides
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Function Starch - Store
energy for later use (last longer)
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Test = Iodine Positive if color changes purple or black
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Found in…
potatoespasta
fruit
honeycorn
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2. Lipids
Fats Oils Waxes
NOT Soluble IN WATER
(They don’t mix)
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Monomers
Glycerol and fatty acids are the monomers of lipids.
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Structure
Composed of long chains of carbons and hydrogen (fatty acids) and glycerol.Fatty acids contain a carboxyl
functional group.
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2 classes of lipids
SaturatedUnsaturated
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Saturated
Have a carbon chain in which all carbon-carbon bonds are single.
Hard to break down. Usually exist as
solids. Found in animal fat.
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Found in…
ButterAnimal fatsWaxesMembranes
Lipid bilayer of cell membrane
Candle wax
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Unsaturated
Have a carbon chain in which 2 or more carbon-carbon double bonds are present.
Easier to break down. Usually exist as
liquids. Found in vegetable
oils.
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Found in…
Vegetable oilMembranes
Lipid bilayer of cell membrane
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Function
Insulation Protection Long term energy storage Help make up biological membranes
(cell membranes)
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3. Proteins
Essential to all life. Composed of amino acids (monomer)
There are 20 different amino acids found in living organisms.
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Composed of…
Carbon, hydrogen, oxygen, and nitrogen
Amino acids are held together by a peptide bond.
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Found in…
muscle
enzymes and antibodies
hairskin
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Functions
Give structure (bone and muscle) Transport nutrients in and out of cell Allow muscles to contract (chemical
messengers) Speed up chemical reactions
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Test = Biurets Positive violet Pink means peptides present
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Enzymes
Speeds up reactions – biological catalyst Help organisms maintain an internal
balance - homeostasis Are proteins Enzyme activity is affected by
pH Temperature Concentration
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EnzymesEnzymes
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What Are What Are Enzymes?Enzymes?
Most enzymes are ProteinsProteins
Act as CatalystCatalyst to accelerate a reaction
Not permanentlyNot permanently changed in the process
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EnzymesEnzymes Are specific for
the reaction they will catalyzecatalyze
Are ReusableReusable
End in –asease-Sucrase-Sucrase-Lactase-Lactase-Maltase-Maltase
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How do enzymes How do enzymes Work?Work?
Enzymes work by weakening weakening bondsbonds which which lowers lowers activation activation energyenergy
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EnzymesEnzymes
FreeEnergy
Progress of the reaction
Reactants
Products
Free energy of activationFree energy of activation
Without Enzyme
With Enzyme
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Enzyme-Substrate Enzyme-Substrate ComplexComplex
The substancesubstance (reactant) an enzymeenzyme acts on is the substratesubstrate
EnzymeSubstrate Joins
Enzyme-substrate complex = when the substrate joins the enzyme
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Active SiteActive Site
A restricted regionrestricted region of an enzymeenzyme molecule which bindsbinds to the substratesubstrate.
EnzymeSubstrate
Active Site
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What Affects Enzyme What Affects Enzyme Activity?Activity?
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1. Environmental 1. Environmental ConditionsConditions
a. Extremea. Extreme Temperature Temperature are the most are the most dangerousdangerous
- - high tempshigh temps may denature (unfold) denature (unfold) the enzyme.enzyme.
b.b. pHpH (most like 6 - 8 pH near neutral) (most like 6 - 8 pH near neutral)
c.c. Ionic concentrationIonic concentration (salt ions) (salt ions)
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2. Cofactors and 2. Cofactors and CoenzymesCoenzymes
Inorganic substances Inorganic substances (zinc, iron)(zinc, iron) and vitaminsvitamins (respectively) are sometimes need for proper enzymatic activityenzymatic activity.
Example:Example:
IronIron must be present in the quaternary quaternary structurestructure -- hemoglobinhemoglobin in order for it to pick up oxygen.pick up oxygen.
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3. Two examples of 3. Two examples of Enzyme InhibitorsEnzyme Inhibitors
a. a. Competitive inhibitorsCompetitive inhibitors:: are chemicals that resembleresemble an enzyme’s enzyme’s normal substratenormal substrate and competecompete with it for the active siteactive site.
Enzyme
Competitive inhibitor
Substrate
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InhibitorsInhibitors
b.b. Noncompetitive inhibitorsNoncompetitive inhibitors::Inhibitors that do not enter thedo not enter the active active
sitesite, but bind tobind to another partanother part of the enzymeenzyme causing the enzymeenzyme to change its change its shapeshape, which in turn alters the alters the active siteactive site.
Enzymeactive site altered
NoncompetitiveInhibitor
Substrate
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4. Nucleic Acids
Made of nucleotides (monomers).Sugar, phosphate, and a nitrogen
base.
Nitrogen
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Composed of…
Long strings of nucleotides held together that make up DNA and RNA.
Carbon, Hydrogen, Oxygen, nitrogen, phosphorous
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Found in…
All living things!Even found in viruses, which
are classified as “nonliving,” but that is controversial.
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Functions
Store, transmit, and transfer the genetic code.
Responsible for making and coding for all proteins.
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Types of Carbon Compounds
CarbonCompounds
include
that consist of
which contain
that consist of that consist of that consist of
which contain which contain which contain
Carbohydrates Lipids Nucleic acids Proteins
Sugars and starches Fats and oils Nucleotides Amino Acids
Carbon,hydrogen,
oxygen
Carbon,hydrogen,
oxygen
Carbon,hydrogen,oxygen, nitrogen,
phosphorus
Carbon,hydrogen,oxygen,
nitrogen,