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AP BIOLOGY: UNIT 1 Flashcards

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4850011183abioticnon-living0
4850016766biomassdry weight of an organism1
4850024591protobiontfirst life form2
4850026220enzymesbiological catalyst for chemical reactions3
4850041814cytologythe study of cells4
4850044077cytologista person who works with cells5
4850048034Prokaryotic Cellsbacterial organisms that evolved before a nucleus had evolved into existence6
4850061465The oldest prokaryotic fossils are found on.....stromatalites7
4850075522Eukaryotic cellsorganisms that contain a nucleus8
4850148322single subunit "Building Blocks"monomers9
4852798914Monomers are linked together by...Covalent Bonds10
4850150704chains of subunitspolymers11
4850157965DNA (Deoxyribonucleic Acid)double-strand helix found in nucleus of cells that contains hereditary material of living organisms12
4850185601atomthe smallest unit of matter that has chemical properties because of it having all the subatomic parts13
4850213892protonsubatomic particles inside nucleus of an atom that contain a positive charge; # of protons never change14
4850227765neutronsubatomic particles inside nucleus of an atom that carry no charge; # of neutrons can change15
4850235057electronssubatomic particles located in the electron cloud around the nucleus and have a negative charge; # of electrons can change16
4850289596Kinetic energyenergy of movement; Ex. electrons moving freely17
4850299803Potential energyenergy of position; Ex. electrons locked in a chemical bond18
4850326612Molecules2 or more atoms bonded together19
4850338820E-levels/ E-shellswhere the electrons are located within an atom or molecule20
4850350584Adding energy to electrons....makes them move farther out21
4850356557Losing energy from electrons.....makes them move inward22
4850359803Valence shellwhere the outer most electrons are located on an atom23
4850366061Valence eRefers to the outer most electrons; most important for chemical bonds and the chemical properties of an element or molecule24
4850384351ValenceRefers to the bonding capacity of an atom; depends on # of valence electrons25
4850458152Chemical Bondsattempts to fill the outer most shell to become more stable molecules; 3 types are covalent, ionic, and hydrogen bonds26
4850530934Covalent Bonds1. The sharing electrons between elements or molecules to fill both outer shells 2. Always creates a molecule(2 or more atoms together of any kind) 3. Strongest type of chemical bond27
4850567968Polar moleculesCarry an electrical charge at opposite poles28
4850594535Nonpolar moleculesCarry no electrical charge29
4850606571ElectronegativityThe element's or molecule's desire to acquire or release electrons 1. Oxygen: Most electronegative biological element (wants to aquire e-) 2. Hydrogen: Least electronegative biological element (wants to release e-)30
4850606572Structural FormulaUsed to show the shape of the molecule31
4850597631Molecular Formula (Chemical Formula)Used to tell the elements, and number of atoms of each, that make up a molecule32
4850602355Ionic Bonds1. Bonds created by donating or accepting electrons so each element can fill it's outer most shell a. DO NOT SHARE ELECTRONS 2. Fairly strong bonds while dry; Weak in water so they dissolve into ions 3. When dissolved in water, ions are created33
4850698314Ionscharged particles34
4855752106Ions love...H2035
4850707486CationsPossess a positive charge because it has more protons than neutrons36
4850710836AnionsPossess a negative charge because it has more electrons than protons37
4850737937Ionic CompoundsA cation bonded to an anion to make a salt when dry38
4850746021Hydrogen Bonds1. Bond in which a hydrogen atom of one molecule is attracted to an electronegative atom, usually oxygen or nitrogen 2. Fairly weak bonds 3. Most important biological bonds39
4850794930Van der Waals Interactions1. Temporary Bonds - usually a fraction of a second 2. Created when electrons clump on one side of an atom making that side temporarily negative and the other side positive resulting in charged particles that can attach momentarily and then they unclump causing the interaction to disappear from the loss of charge by constanty moving electrons40
4850838608How to read a periodic table41
4850888828Water Cycle42
4850912039Water's Polarity1. H20's polarity allows for it to make HYDROGEN bonds easily which helps with.... a. nutrient transport b. conducts electricity well c. allows for a single water molecule to bind to 4 other H20 molecules at a time43
4851003055How is does H20 and Hydrogen bonding work?1. 2 negative electrons from Hydrogen "clump" around the oxygen atom as a result of the covalent bonding between HYDROGEN and OXYGEN 2. Therefore, the OXYGEN molecule has more electrons than normal and thus a negative charge and the HYDROGEN end just has a single positive proton 3. Thus, one negative side and one positive side44
4850913617Water's 4 Properties1. Adhesion 2. Cohesion 3. Temperature Regulation 4. Evaporative Cooling45
4850919820Cohesion1. Refers to water molecules binding to other water molecules 2. Made possible due to HYDROGEN BONDS!!!46
4850921641Cohesion-Tension PrincipleDescribes how water moves upward in plants xylem tissues by making water chains47
4850923091Adhesion1. Refers to water molecules binding to something other than water molecules 2. Made possible due to HYDROGEN BONDS!!!48
4850931079Evaporative Cooling1. Effect for plants and animals a. If heat energy is put into water, the water evaporates and carries the heat energy away from the body leaving a cooling organism as the energy leaves.49
4850952024Temperature Regulation1. In organisms and on earth, water keeps temperature stable a. Made possible due to HYDROGEN BONDS!!! b. Lots of energy needed to break all 4 hydrogen bonds at once & turn liquid water to a gas<--- IMPORTANT EFFECT 2. Example: a. Ice cubes & hot drinks: The hot drink molecules lose energy as they try to warm the frozen water molecules resulting in a cool drink50
4851174021Humiditywater vapor in the air51
4851437317SolventLiquid that is doing the dissolving of another substance Ex. Water52
4851442596SoluteSubstance being dissolved in the solvent Ex. Salt in Water53
4851459639SolutionSubstance possessing equal distribution of material Ex. Koolaid Tea54
4851471437SuspensionTemporary suspension of material Ex. Blood Italian dressing. herbs in a bottle55
4851481506ColloidExtended temporary suspension of material Ex. Milk56
4851492157Hydrogen bonds make.....Solvents, solute, solution, suspension, and colloid possible57
4851501875Hydration shellWater surrounding a molecule; substance is dissolved and "disappears"58
4851520059Water can't grab hold and dissolve....Oils, grease, and fat since they are nonpolar59
4851527324HydrophobicWater fearing; water can't attach to the substance because the substance is non-polar60
4851654541HydrophilicWater loving; water can attach to the substance because the substance is polar61
4851664551MoleThe measurement of molecules that is relative to its molecular weight62
4851667430Avogradro's #6.02 x 10^23 # of molecules of that particular substance present in 1 mole63
48516903201 mole is equal to...Using the Periodic Table, find the molecular weight of a molecule and then weigh out that many grams of the substance64
4851721684MolarityTerm for telling how many moles of a substance are dissolved in a solution (Usually H2O)65
4851740077DissociationThe breaking apart of water into H+(Proton) and an OH-(hydroxide ion)66
4851774595pH ScaleMeausures how acidic or basic a substance is 1. Goes from 0 to 14 2. 7 is neutral67
4851759343Acid1. A substance that gives away H+ 2. On the pH any substance <768
4851759344Base1. A substance that gives away OH- 2. On the pH any substance >769
4851824168BufferA substance that can resist changes in pH or pOH a. It can take on or give off a H+ or OH- to maintain the pH or pOH concentration70
4851844870Ex. of a BufferHuman Blood; buffer is bicarbonate( HCO3-) 1. Bicarbonate helps keep blood at a pH of 7.4 ideally 2. Needed because of the food, drink, air, or other substances we put in our bodies 3. pH of blood affects oxygen's ability to adhere to red blood cells71
4851867409AcidosisDeadly condition where blood pH is below 7.272
4851883651AlkalosisDeadly condition where blood pH is above 7.673
4851887389"sis"the condition of being74
4851898263Acid PrepitationRefers to rain, snow, sleet, ice, or fog with a low pH ( less than 5.6)75
4851939878LeachingRefers to the rain pushing nutrients away from plant roots to deeper in the soil resulting in the plant to starve and the rain burns the plants leaves76
4851970636BiomassAn organism's dry weight77
4852284584Organic chemistryBranch of science dealing with the element carbon and its many properties78
4852398910About 30% of an organism's biomass is...Carbon in organic molecules79
4852417677The original source for Carbon in all life forms is...Carbon Dioxide (CO2) & Photosynthesis80
4852424684Plants emit both...Oxygen and Carbon Dioxide81
4852447231Stanley Miller Experiment- In 1953, he took inorganic substances found in Earth's early atmosphere (H2O vapor, H2, NH3, & CH4) and created organic amino acids and oils 1. There are 20 amino acids that are used to make proteins in living organisms 2. Early Earth? (He anaylzed volcanic gases to determine what the air must have been like) 3. Energy source to power the chemical reactions? (Electricity replaces lightning)82
4852500294Carbon has versatility in 4 directions b/c of...Tetravalence which allows carbon to act like an intersection in the building of an organic molecule; this allows cells to build an almost infinite # of different molecules83
4852556049Covalent Bonding Capabilities of Carbon include....Single Bond, Double Bond, & Triple Bond84
4852562634HydrocarbonsMolecules including mostly Carbon and Hydrogen a. Energy sources (Fossil fuels & Oils) -The more hydrogen atoms, the more energy b. Important parts in cell membranes -Ex. Tails of phospholipids c. Extremely hydrophobic due to being nonpolar85
4852594684The Functional Groups Associated w/ Organic Moleculesthe sites of most organic molecules chemical reactions or properties86
4852611306The 6 Functional GroupsHydroxyls, Carbonyls, Carboxyls, Amine, Sulfhydryls, Phosphate87
4852624782Hydroxyl(-OH) Allows molecules to act as an alcohol or polar molecule88
4852629158Carbonyl-Only has one double bonded oxygen -Aldehydes & Ketones89
4852630811Carboxyl-Has 2 oxygens (one double bonded & one singled bonded) -These molecules can act as an acid by losing a Hydrogen atom and can also possibly polar too90
4852630812Amine-Contains Nitrogen -Can act as bases by picking up free H+91
4852632967Sulfhydryl-Contains Sulfur -Sulfur can make Di-Sulfide bridges for "pockets" in protein formation92
4852632968Phosphate(PO43-) molecules are usually involved in energy transfer; can also act as an anion93
4852707076Chloroflourocarbon-nontoxic, nonflammable chemicals containing atoms of carbon, chlorine, and fluorine -used in the manufacture of aerosol sprays, blowing agents for foams and packing materials, as solvents, and as refrigerants -harmful to ozone layer and release of chlorine atoms upon exposure to ultraviolet radiation94
4852728642Life is only possible b/c of....CARBON95
4852741982Lewis Dot Structure-need 8 electrons in the outer shell (octet rule) -atoms that complete their octet will be "happy"96
4852752446The Key to LifeMaking and breaking bonds97
4852782053Macromoleculeslarge molecules98
4852784344Macromolecules are formed by...dehydration & condensation reactions99
4855762435What helps make the organic molecules?CARBON100
4855864695What are the ingredients for life and the essentials for energy storage called?Biological Molecules101
4855879042CarbohydratesSugars102
4855888803MonosaccharidesMonomers of carbohydrates103
4855894548PolysaccharidesPolymers of carbohydrates104
4855898151DisaccharidesTwo monosaccharides105
4855912918Examples of CarbohydratesGlucose, Fructose, Sucrose106
4855917661Primary short term energy sources for cellsCarbohydrates107
4855921284StarchEnergy storage in plants108
4855927803GlycogenEnergy storage in animals109
4855930063Cellulose1. Structural component of cell plant walls 2. Most abundant organic compound on Earth110
4855949987ChitinFound in exoskeleton of insects and some animals and some Fungi cell walls111
4855960421LipidsMacromolecules that are fats, oils, waxes, and steriods112
4855974809Most lipids are....Hydrophobic113
4855979608Lipids are mainly composed of...Hydrocarbons114

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