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Biochemistry - AP Biology Flashcards

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4892152615Amino Acid0
4892154802Amino Group1
4892155969Carbonyl Group2
4892157290Carboxyl Group (Carboxylic Acid Group)3
4892158971Steroid4
4892161338Covalent BondType of bond formed when atoms share electrons. This strong bond does not dissolve in water.5
4892162456Disaccharide6
4892173055Deoxyribonucleic Acid (DNA)7
4892174537Polysaccharide8
4892176236Hydrogen BondWeak bond formed by electrostatic attraction between the partial positive charge on a hydrogen atom and the partial negative charge on another atom.9
4892177577Hydroxyl Group10
4892178993Ionic BondVery strong bond formed by electrostatic attraction between positively and negatively charged atoms. Dissolves in water.11
4892182118MonosaccharideA carbohydrate containing a single sugar molecule.12
4892183331NucleotideThe monomer that forms nucleic acids like DNA and RNA. Consists of a nitrogenous base linked to a sugar and a phosphate group.13
4892185097Phosphate Group14
4892188877Protein15
4892190335Sulfhydryl Group16
4892192312Triglyceride17
4892193812Van der Waals BondExtremely weak bond formed by transient electrostatic interactions between non-polar molecules.18
4892911086MonomerA subunit that links with others in a chain to form a larger molecule (polymer).19
4892914340PolymerA large molecule make up of many smaller molecules (monomers) linked together.20
4892914341Organic MoleculeA molecule found produced by living organisms containing carbon.21
4892932685LipidA hydrophobic compound containing C and H atoms. Examples include fats, oils, steroids, and waxes.22
4892932686CarbohydrateA hydrophilic compound containing 1 C: 2 H : 1 O. Examples include sugar, starch, glycogen, and cellulose.23
4892934229PhospholipidAn amphipathic molecule with a hydrophilic "head" and hydrophobic "tail." Forms cell membranes.24
4892947163AtomThe basic unit of matter, consisting of a nucleus containing protons and neutrons, surrounded by an electron cloud.25
4892947164MoleculeA group of atoms held together by covalent bonds.26
4892949826ProtonA positively charged particle found in the nucleus of an atom.27
4892949827NeutronAn uncharged particle found in the nucleus of an atom.28
4892951671ElectronA negatively charged particle orbiting the nucleus of an atom.29
4892951672Valence ElectronThe electrons in the outermost shell (main energy level) of an atom; these are the electrons involved in forming bonds.30
4892951673EnzymeA protein catalyst that speeds up biochemical reactions by lowering their activation energy.31
4892953575CatalystA substance that speeds up reactions by lowering their activation energy, but is not used up in the reaction.32
4892953576Activation EnergyThe minimum amount of energy required to start a chemical reaction.33
4892955977ExergonicChemical reactions that release energy.34
4892958704EndergonicChemical reactions that absorb energy.35
4892969302AcidA substance that releases hydrogen ions (proton donor). Has a pH less than 7.0.36
4892969303BaseA substance that binds hydrogen ions (proton acceptor). Has a pH greater than 7.0.37
4892969304BufferA substance that keeps the pH stable.38
4892973437pH-log[H+] =39
4893038801Hydrophilic (Polar)Charged or partially charged molecules that are miscible or soluble in water. Name means "water loving."40
4893038802Hydrophobic (Non-polar)Molecules with no charge that are not miscible or soluble in water. Name means "water hating."41
4893041523AmphipathicMolecules with both a polar end and a non-polar end. Name means "both hating." Synonymous with "amphiphilic" ("both loving").42
4893104479Atomic numberThe number of protons in an atom.43
4893105756Atomic massThe (average) number of protons plus neutrons in an atom.44
4893107775IonAn atom with a positive or negative charge.45
4893240961Specific HeatThe amount of energy required to change the temperature of a material. Water has a high value.46
4893244707Surface TensionA force that tends to pull adjacent parts of a liquid's surface together, thereby decreasing surface area to the smallest possible size.47
4893281414ElectronegativeTends to attract electrons. Highest for elements in the upper right corner of the periodic table.48

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