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AP Biology Chapter 5 Flashcards

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7327107608macromoleculea giant molecule formed by the joining of smaller molecules, usually by a dehydration reaction.0
7327107609Four classes of biological macromoleculesProteins, carbohydrates, nucleic acids, lipids1
7327107610polymera long molecule consisting of many similar or identical monomers linked together by covalent bonds.2
7327107611monomerthe subunit that serves as the building block of a polymer.3
7327107612dehydration synthesisa chemical reaction in which two molecules become covalently bonded to each other with the removal of a water molecule.4
7327107613hydrolysisa chemical reaction that breaks bonds between two molecules by the addition of water; functions in dis-assembly of polymers to monomers.5
7327107614proteina biologically functional molecule consisting of one or more polypeptides folded and coiled into a specific three-dimensional structure.6
7327107615Functions of proteinsstructural support, catalyst, transport, defense, movement, regulation7
7327107616amino acidan organic molecule possessing both a carboxyl and an amino group. The monomers of polypeptides. There are 20 different forms. Distinguished by side chains.8
7327107617peptide bondthe covalent bond between the carboxyl group on one amino acid and the amino group on another, formed by a dehydration reaction.9
7327107618Primary structurethe level of protein structure referring to the specific linear sequence of amino acids.10
7327107619secondary structureregions of repetitive coiling or folding of the polypeptide backbone of a protein due to hydrogen bonding between constituents of the backbone (not the side chains). Helix or pleated sheet.11
7327107620B pleated sheetprotein structure with two or more segments of the polypeptide chain link side by side (called B strands) connected by hydrogen bonds between parts of the two parallel segments of the polypeptide backbone.12
7327107621tertiary structurethe overall shape of a protein molecule due to interactions of amino acid side chains, including hydrophobic interactions, ionic bonds, hydrogen bonds, and disulfide bridges.13
7327107622amino acid side chainstypes of bonds/interactions in __________ : hydrophobic interactions, ionic bonds, hydrogen bonds and disulfide bridges14
7327107623quaternary structurethe particular shape of a complex, aggregate protein, defined by the characteristic three-dimensional arrangement of its constituent subunits, each a polypeptide.15
7327107624denaturationloss of a proteins normal 3D structure; can possibly be caused by pH and temperature which affect the ionic bonds, hydrogen bonds & hydrophilic interactions16
7327107625enzymea macromolecule serving as a catalyst, a chemical agent that increases the rate of a reaction without being consumed by the reaction. most of them are proteins.17
7327107626carbohydratea sugar (monosaccharide) or one of its dimers (disaccharides) or polymers (polysaccharides). Primarily C, H and O.18
7327107627What are the functions of carbohydratesfunction as energy source & structure19
7327107628monosaccharidethe simplest carbohydrate, active alone or serving as a monomer for disaccharides and polysaccharides. Also called simple sugars, they have formulas that are generally some multiple of CH2O (1:2:1).20
7327107629disaccharidea double sugar, consisting of two monosaccharides joined by a glycosidic linkage formed by a dehydration reaction.21
7327107630glycosidic linkagea covalent bond formed between two monosaccharides by a dehydration reaction.22
7327107631polysaccharidea polymer of many monosaccharides, formed by dehydration reactions.23
7327107632starcha storage polysaccharide in plants, consisting entirely of glucose monomers joined by x glycosidic linkages. Used for energy storage.24
7327107633glycogenan extensively branched glucose storage polysaccharide found in the liver and muscle of animals; the animal equivalent of starch.25
7327107634cellulosea structural polysaccharide of plant cell walls, consisting of glucose monomers joined by B glycosidic linkages. A type of plant starch.26
7327107635lipidsany of a group of large biological molecules, including fats, phospholipids, and steroids, that mix poorly, if at all, with water (hydrophobic). No true monomers.27
7327107636What are the three types of lipids?fats/oils, phospholipids & steroids28
7327107637fat/oila lipid consisting of three fatty acids lined to one glycerol molecule; also called a triacylglycerol or triglyceride. Function as energy storage.29
7327107638saturateda fatty acid in which all carbons in the hydrocarbon tail are connected by single bonds, thus maximizing the number of hydrogen atoms that are attached to the carbon skeleton.30
7327107639unsaturateda faty acid that has one or more double bonds betwen carbons in the hydrocarbon tail. such bonding reduces the number of hydrogen atoms attached to the carbon skeleton.31
7327107640fatty acida carboxylic acid with a long carbon chain. Vary in length and __________ linked to a glycerol molecule form a fat molecule, also called triglyceride.32
7327107641triglyceridea lipid consisting of three fatty acids linked to one glycerol molecule33
7327107642chitina structural polysaccharide, consisting of amino sugar monomers, found in many fungal cell walls and in the exoskeletons of all arthropods.34
7327107643trans fatan unsaturated fat, formed artificially during hydrogenation of oils, containing one or more trans double bonds.35
7327107644phospholipida lipid made up of glycerol joined to two fatty acids and a phosphate group. The hydrocarbon chains of the fatty acids act as nonpolar hydrophobic tails, while the rest of the molecule acts s a polar, hydrophilic head. They form bilayers that function as biological membrane.36
7327107645phospholipid bilayerfunction as membranes37
7327107646steroida type of lipid characterized by a carbon skeleton consisting of four fused rings with various chemical groups attached. Function as part of membranes or hormones.38
7327107647catalysta chemical agent that selectively increases the rate of a reaction without being consumed by the reaction.39
7327107648hydrophobica type of weak chemical interaction caused when molecules that do not mix with water coalesce to exclude water.40
7327107649disulfide bridgesa strong covalent bond formed when the sulfur of one cysteine monomer bonds to the sulfur of another cysteine monomer.41
7327107650polypeptidea polymer of many amino acids linked together by peptide bonds.42
7327107651nucleic acida polymer (polynucleotide) consisting of many nucleotide monomers; serves as a blueprint for proteins and, through the actions of proteins, for all cellular activities. the two types are DNA and RNA.43
7327107652nucleic acidfunctions as storage, transmission & use of genetic material44
7327107653nucleotidethe building block of a nucleic acid, consisting of a five-carbon sugar covalently bonded to a nitrogenous base and one or more phosphate groups.45
7327107654phosphodiester linkagebond between nucleotides in nucleotide chain to form polynucleotide46
7327107655polynucleotidea polymer consisting of many nucleotide monomers in a chain. The nucleotides can be those of DNA or RNA.47
7327107656pyrimidineone of two types of nitrogenous bases found in nucleotides, characterized by a six-membered ring. cytosine (c), thymine (T), and uracil (U)48
7327107657purinesone of two types of nitrogenous bases found in nucleotides, characterized by a six-membered ring fused to a five-membered ring. adenine (a) and guanine (G).49
7327107658RNAtransmission of information, consists of monomers with a ribose sugar and nitrogenous bases cytosine (C), guanine (G), adenine (A) & uracil (U). Single stranded.50
7327107659DNAa nucleic acid molecule, usually a double-stranded helix, in which each polynucleotide strand consists of nucleotide monomers with a deoxyribose sugar and the nitrogenous bases adenine (A), cytosine (C), guanine (G), and thymine (T); capable of being replicated and determining the inherited structure of a cell's proteins.51
7327107660deoxyribosethe sugar component of DNA nucleotides, having one fewer hydroxyl group than ribose, the sugar component of RNA nucleotides.52
7327107661ribosethe sugar component of RNA nucleotides.53
7327107662double helixthe form of native DNA, referring to its two adjacent antiparallel polynucleotide strands wound around an imaginary axis into a spiral shape.54
7327107663antiparallelreferring to the arrangement of the sugar-phosphate backbones in a DNA double helix (they run in opposite 5' -3' directions).55

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