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AP Biology Chapter 5 Flashcards

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5477724183macromoleculea giant molecule formed by the joining of smaller molecules, usually by a dehydration reaction.0
5477724184Four classes of biological macromoleculesProteins, carbohydrates, nucleic acids, lipids1
5477724185polymera long molecule consisting of many similar or identical monomers linked together by covalent bonds.2
5477724186monomerthe subunit that serves as the building block of a polymer.3
5477724187dehydration synthesisa chemical reaction in which two molecules become covalently bonded to each other with the removal of a water molecule.4
5477724188hydrolysisa chemical reaction that breaks bonds between two molecules by the addition of water; functions in dis-assembly of polymers to monomers.5
5477724189proteina biologically functional molecule consisting of one or more polypeptides folded and coiled into a specific three-dimensional structure.6
5477724190Functions of proteinsstructural support, catalyst, transport, defense, movement, regulation7
5477724191amino 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
5477724192peptide bondthe covalent bond between the carboxyl group on one amino acid and the amino group on another, formed by a dehydration reaction.9
5477724193Primary structurethe level of protein structure referring to the specific linear sequence of amino acids.10
5477724194secondary 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
5477724195B 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
5477724196tertiary 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
5477724198quaternary structurethe particular shape of a complex, aggregate protein, defined by the characteristic three-dimensional arrangement of its constituent subunits, each a polypeptide.14
5477724199denaturationloss of a proteins normal 3D structure; can possibly be caused by pH and temperature which affect the ionic bonds, hydrogen bonds & hydrophilic interactions15
5477724200enzymea 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.16
5477724201carbohydratea sugar (monosaccharide) or one of its dimers (disaccharides) or polymers (polysaccharides). Primarily C, H and O.17
5477724202What are the functions of carbohydratesfunction as energy source & structure18
5477724203monosaccharidethe 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).19
5477724204disaccharidea double sugar, consisting of two monosaccharides joined by a glycosidic linkage formed by a dehydration reaction.20
5477724205glycosidic linkagea covalent bond formed between two monosaccharides by a dehydration reaction.21
5477724206polysaccharidea polymer of many monosaccharides, formed by dehydration reactions.22
5477724207starcha storage polysaccharide in plants, consisting entirely of glucose monomers joined by x glycosidic linkages. Used for energy storage.23
5477724208glycogenan extensively branched glucose storage polysaccharide found in the liver and muscle of animals; the animal equivalent of starch.24
5477724209cellulosea structural polysaccharide of plant cell walls, consisting of glucose monomers joined by B glycosidic linkages. A type of plant starch.25
5477724210lipidsany of a group of large biological molecules, including fats, phospholipids, and steroids, that mix poorly, if at all, with water (hydrophobic). No true monomers.26
5477724211What are the three types of lipids?fats/oils, phospholipids & steroids27
5477724212fat/oila lipid consisting of three fatty acids lined to one glycerol molecule; also called a triacylglycerol or triglyceride. Function as energy storage.28
5477724213saturateda 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.29
5477724214unsaturateda 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.30
5477724215fatty acida carboxylic acid with a long carbon chain. Vary in length and __________ linked to a glycerol molecule form a fat molecule, also called triglyceride.31
5477724216triglyceridea lipid consisting of three fatty acids linked to one glycerol molecule32
5477724219phospholipida 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.33
5477724221steroida 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.34
5477724223hydrophobica type of weak chemical interaction caused when molecules that do not mix with water coalesce to exclude water.35
5477724224disulfide bridgesa strong covalent bond formed when the sulfur of one cysteine monomer bonds to the sulfur of another cysteine monomer.36
5477724225polypeptidea polymer of many amino acids linked together by peptide bonds.37
5477724228nucleotidethe building block of a nucleic acid, consisting of a five-carbon sugar covalently bonded to a nitrogenous base and one or more phosphate groups.38
5477724229phosphodiester linkagebond between nucleotides in nucleotide chain to form polynucleotide39
5477724233RNAtransmission of information, consists of monomers with a ribose sugar and nitrogenous bases cytosine (C), guanine (G), adenine (A) & uracil (U). Single stranded.40
5477724234DNAa 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.41
5477724235deoxyribosethe sugar component of DNA nucleotides, having one fewer hydroxyl group than ribose, the sugar component of RNA nucleotides.42
5477724236ribosethe sugar component of RNA nucleotides.43

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