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AP Biology- Biochemistry Flashcards

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8038640719ionic bondbond resulting from a transfer of electrons causing an attraction between oppositely charged ions0
8038640720covalent bondA chemical bond that involves sharing a pair of electrons between atoms in a molecule1
8038640721nonpolara molecule in which all atoms have the same electronegativity and the electron distribution is equal, hydrophobic2
8038640722polarmolecule in which the positive and negative charges are separated and unequal, hydrophilic3
8038640723buffermixture that can react with an acid or a base to maintain the pH within a specific range4
8038640724isomerorganic compounds with the same molecular formula but different structure5
8038640725monosaccharideA single sugar molecule such as glucose or fructose, the simplest type of sugar; monomer of carbohydrates6
8038640726disaccharideA double sugar, consisting of two monosaccharides joined by dehydration synthesis.7
8038640727dehydration synthesisA chemical reaction in which two molecules are bonded together with the removal of a water molecule.8
8038640728hydrolysisBreaking down complex molecules (polymers) by the chemical addition of water.9
8038640729polysaccharideA polymer of many monosaccharides, formed by dehydration reactions.10
8038640730cellulosestructural polysaccharide that makes up plant cell walls11
8038640731starchStorage polysaccharide found in plant cells that consists entirely of glucose monomers12
8038640732glycerolThree-carbon compound with three hydroxyl groups; fatty acids are covalently bonded to it to make fats and oils.13
8038640733fatty acidhydrocarbon chain with a carboxyl group at one end; majority portion in lipids14
8038640734saturated fatA lipid made from fatty acids that have no double bonds between carbon atoms; solid at room temperature and found in animal fats, lards, and dairy products.15
8038640735unsaturated fatA lipid made from fatty acids that have at least one double bond between carbon atoms; liquid at room temperature and found in vegetable oils, nuts, and seeds.16
8038640736steroidlipid with a four fused ring structure; cholesterol and testosterone17
8038640737peptide bondbond creating amino acid chains or polymers18
8038640738primary structurelinear sequence of amino acids; peptide bonds19
8038640739secondary structureEither an alpha helix or beta pleated sheet formed with hydrogen bonds20
8038640740tertiary structure3D shape of single polypeptide due to interactions of the side chains using hydrogen bonding, ioning bonding and disulphide bridges21
8038640741quaternary structureThe shape resulting from the association of two or more polypeptide subunits.22
8038640742alpha helixsecondary structure form of a protein; human hair (keratin)23
8038640743beta pleated sheetsecondary structure form of a protein; spider webs and silk24
8038640744functional groupgroup of atoms within a molecule that interacts in predictable ways with other molecules25
8038640745cohesionattraction between molecules of the same substance; Water molecules sticking to each other.26
8038640746polymerlong molecule consisting of many similar or identical monomers linked together27
8038640747monomerbuilding block for polymers; only made by producers28
8038640748adhesionattraction between different kinds of molecules; Water molecules sticking to other surfaces.29
8038640749surface tensionmeasure of how difficult it is to stretch or break the surface of a liquid30
8038640750van der Waals interactionstertiary structure; weak attractions between molecules or parts of molecules that result from localized charge fluctuations31
8038640751disulfide bridgetertiary structure; strong covalent bond formed when one sulfur of one cysteine monomer bonds to the sulfur of another32
8038640752hydrocarbonorganic molecule consisting of only hydrogen and carbon33
8038640753glycosodic linkagecovalent bond formed between two monosaccharides by a dehydration synthesis reaction34
8038640754nucleotidebuilding block of a nucleic acid; five carbon sugar covalently bonded to a nitrogen base and a phosphate group35
8038640755hydroxylhydrogen bonded to oxygen bonded to an organic molecule's carbon skeleton; alcohol; polar36
8038640756carboxyloxygen double bonded to a carbon atom that is bonded to a hydroxyl group37
8038640757aminenitrogen bonded to two hydrogens and to the carbon skeleton38
8038640758sulfhydrylsulfur bonded to hydrogen in roughly the shape of a hydroxyl; cysteine39
8038640759phosphatephosphorous bonded to four oxygens; found in phospholipids and nucleotides40
8038640760carbohydrateLarge organic molecule made of monosaccharides; 1:2:1 ratio of carbon, hydrogen, and oxygen atoms; major source of energy for the human body41
8038640761lipidnon polar macromolecule made mainly from carbon and hydrogen atoms; includes fats, oils, and waxes42
8038640762proteinLarge organic molecule made of amino acids; includes carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur.43
8038640763nucleic acidLarge macromolecule made of nucleotides containing hydrogen, oxygen, nitrogen, carbon, and phosphorus; the genetic material of organisms44

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