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Biochemistry Flashcards

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1416392807nonpolar covalent bonda strong bond formed when electrons are shared equally0
1416392808polar covalent bonda strong bond formed when electrons are shared unequally1
1416392809ionic bonda bond formed when a more electronegative atom takes electrons from another atom2
1416392810hydrogen bondweak bonds formed between molecules. They form when a positively charged hydrogen atom is attracted to a negatively charged atom of another molecule. No electron sharing or taking.3
1416392811polara molecule with a slightly positive end and a slightly negative end. These molecules are hydrophilic or water loving.4
1416392812nonpolara molecule with no negative or positive end. These molecules are hydrophobic or water fearing.5
1416392813cohesionA property of water. It is the attraction between two water molecules. This attraction creates hydrogen bonds between water molecules.6
1416392814adhesionA property of water. It is the attraction between a water molecule and another polar substance.7
1416392815transpirationthe movement of water from the roots to the leaves of a plant.8
1416392816specific heat capacitythe amount of energy needed to raise one mL (or g) of water one degree Celsius. It is the degree to which a substance changes in response to a gain or loss of heat. Water has a HIGH specific heat capacity -- it can take in a lot of heat energy before it changes temperature.9
1416392817hydrophilicwater loving10
1416392818hydrophobicwater fearing11
1416392819acidmolecule with a pH less than 712
1416392820basemolecule with a pH greater than 713
2249960903buffera substance that resists change in pH even when an acid or base is added to it14
1416392822dehydration synthesisa reaction in which water is removed to create a covalent bond between two monomers15
1416392823hydrolysisa reaction in which water is added to break a covalent bond between two monomers16
1416392824denatureoccurs when the natural properties of a substance are taken. Occurs most often with proteins.17
1416392825polymera chain of monomers18
1416392826monomera small molecule that acts as one unit of a longer molecule called a polymer19
1416392827monosaccharidethe smallest unit of a sugar, one carbohydrate ring20
1416392828disaccharidetwo monosaccharides bound by covalent bond21
1416392829polysaccharidemany monosaccharides bound together by covalent bonds22
1416392830starcha polysaccharide found in plants to store energy long term23
1416392831glycogena polysaccharide found in animals to store energy long term24
1416392832cellulosea polysaccharide found in plants to provide structural support25
1416392833chitina polysaccharide found in animals like insects to provide structural support26
1416392834steroida nonpolar hormone with a cholesterol base27
1416392835phospholipida lipid with two fatty acid tails and a polar phosphate head. It's the molecule that makes up most of the cell membrane.28
1416392836saturateda lipid no double bonds between the individual carbon atoms of the fatty acid chain. That is, the chain of carbon atoms is fully "saturated" with hydrogen atoms.29
1416392837unsaturateda lipid at least one double bond between the individual carbon atoms of the fatty acid chain. That is, the chain of carbon atoms is not fully "saturated" with hydrogen atoms30
1416392838amino acidthe smallest unit of a protein31
1416392839peptide bondthe bond between two amino acids32
1416392840alpha helixthe spiral shape formed by some polypeptide chains as proteins configure into their final shape. This is an option for the secondary structure of a protein.33
1416392841beta pleated sheetthe zig zag shape formed by some polypeptide chains as proteins configure into their final shape. This is an option for the secondary structure of a protein.34
1416392842primary structurethe structure of a protein that describes the simple order of amino acids35
1416392843secondary structurethe 3 dimensional shape that results from hydrogen bonds between amino acids36
1416392844tertiary structurethe 3 dimensional shape that allows proteins to form a globular shape37
1416392845quaternary structurethe combination of 2 or more tertiary structures of proteins38
1416392846phosphate groupa negatively charged molecule found in nucleotides. They help form the backbone of DNA and RNA along with sugars39
1416392847pentose sugara sugar that forms a pentagon ring40
1416392848nitrogenous basethe base that binds to a phosphate group and sugar to form a nucleotide41
1416392849nucleotidethe smallest unit of DNA or RNA. There are four of them - A,G,C,T42

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