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AP Biology Chapter 5 Flashcards

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6109371592macromoleculea giant molecule formed by the joining of smaller molecules, usually by a dehydration reaction.0
6109371593Four classes of biological macromoleculesProteins, carbohydrates, nucleic acids, lipids1
6109371594polymera long molecule consisting of many similar or identical monomers linked together by covalent bonds.2
6109371595monomerthe subunit that serves as the building block of a polymer.3
6109371596dehydration synthesisa chemical reaction in which two molecules become covalently bonded to each other with the removal of a water molecule.4
6109371597hydrolysisa chemical reaction that breaks bonds between two molecules by the addition of water; functions in dis-assembly of polymers to monomers.5
6109371598proteina biologically functional molecule consisting of one or more polypeptides folded and coiled into a specific three-dimensional structure.6
6109371599Functions of proteinsstructural support, catalyst, transport, defense, movement, regulation7
6109371600amino 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
6109371601peptide bondthe covalent bond between the carboxyl group on one amino acid and the amino group on another, formed by a dehydration reaction.9
6109371602Primary structurethe level of protein structure referring to the specific linear sequence of amino acids.10
6109371603secondary 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
6109371604B 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
6109371605tertiary 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
6109371606amino acid side chainstypes of bonds/interactions in __________ : hydrophobic interactions, ionic bonds, hydrogen bonds and disulfide bridges14
6109371607quaternary structurethe particular shape of a complex, aggregate protein, defined by the characteristic three-dimensional arrangement of its constituent subunits, each a polypeptide.15
6109371608denaturationloss of a proteins normal 3D structure; can possibly be caused by pH and temperature which affect the ionic bonds, hydrogen bonds & hydrophilic interactions16
6109371609enzymea 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
6109371610carbohydratea sugar (monosaccharide) or one of its dimers (disaccharides) or polymers (polysaccharides). Primarily C, H and O.18
6109371611What are the functions of carbohydratesfunction as energy source & structure19
6109371612monosaccharidethe 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
6109371613disaccharidea double sugar, consisting of two monosaccharides joined by a glycosidic linkage formed by a dehydration reaction.21
6109371614glycosidic linkagea covalent bond formed between two monosaccharides by a dehydration reaction.22
6109371615polysaccharidea polymer of many monosaccharides, formed by dehydration reactions.23
6109371616starcha storage polysaccharide in plants, consisting entirely of glucose monomers joined by x glycosidic linkages. Used for energy storage.24
6109371617glycogenan extensively branched glucose storage polysaccharide found in the liver and muscle of animals; the animal equivalent of starch.25
6109371618cellulosea structural polysaccharide of plant cell walls, consisting of glucose monomers joined by B glycosidic linkages. A type of plant starch.26
6109371619lipidsany 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
6109371620What are the three types of lipids?fats/oils, phospholipids & steroids28
6109371621fat/oila lipid consisting of three fatty acids lined to one glycerol molecule; also called a triacylglycerol or triglyceride. Function as energy storage.29
6109371622saturateda 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
6109371623unsaturateda 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
6109371624fatty 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
6109371625triglyceridea lipid consisting of three fatty acids linked to one glycerol molecule33
6109371626chitina structural polysaccharide, consisting of amino sugar monomers, found in many fungal cell walls and in the exoskeletons of all arthropods.34
6109371627trans fatan unsaturated fat, formed artificially during hydrogenation of oils, containing one or more trans double bonds.35
6109371628phospholipida 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
6109371629phospholipid bilayerfunction as membranes37
6109371630steroida 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
6109371631catalysta chemical agent that selectively increases the rate of a reaction without being consumed by the reaction.39
6109371632hydrophobica type of weak chemical interaction caused when molecules that do not mix with water coalesce to exclude water.40
6109371633disulfide bridgesa strong covalent bond formed when the sulfur of one cysteine monomer bonds to the sulfur of another cysteine monomer.41
6109371634polypeptidea polymer of many amino acids linked together by peptide bonds.42
6109371635nucleic 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
6109371636nucleic acidfunctions as storage, transmission & use of genetic material44
6109371637nucleotidethe 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
6109371638phosphodiester linkagebond between nucleotides in nucleotide chain to form polynucleotide46
6109371639polynucleotidea polymer consisting of many nucleotide monomers in a chain. The nucleotides can be those of DNA or RNA.47
6109371640pyrimidineone of two types of nitrogenous bases found in nucleotides, characterized by a six-membered ring. cytosine (c), thymine (T), and uracil (U)48
6109371641purinesone 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
6109371642RNAtransmission of information, consists of monomers with a ribose sugar and nitrogenous bases cytosine (C), guanine (G), adenine (A) & uracil (U). Single stranded.50
6109371643DNAa 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
6109371644deoxyribosethe sugar component of DNA nucleotides, having one fewer hydroxyl group than ribose, the sugar component of RNA nucleotides.52
6109371645ribosethe sugar component of RNA nucleotides.53
6109371646double helixthe form of native DNA, referring to its two adjacent antiparallel polynucleotide strands wound around an imaginary axis into a spiral shape.54
6109371647antiparallelreferring 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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