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Biochemistry I Exam II Flashcards

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12111398237ProteinsWhat is the most abundant biomolecule in the body?0
12111416769GlycineWhat is the only amino acid that lacks a chiral center?1
12111422268C-terminalWhat part of the amino acid contains a carboxylic acid?2
12111427364N-terminalWhat part of the amino acid contains an amine group?3
12111435971L-chiralWhat type of chirality has a CRN clockwise arrangement?4
12111451559D-chiralWhat type of chirality has a CRN counterclockwise arrangement?5
12111458271RacemicIf the chiral center is a 50-50 mixture of L and D it is referred to as what?6
12111468811L-chiralAlanine has what chirality?7
12111479144AlanineWhich amino acid functions to make new glucose? (Gluconeogenesis)8
12111530151AliphaticWhat is the term for an R group that contains a hydrocarbon?9
12111564989LeucineWhich amino acid is metabolized into the cholesterol precursor HMG CoA?10
12111583033ValineWhich amino acid is responsible for the improper folding of red blood cells?11
12111588839HemoglobinValine replaces glutamate and causes improper folding in what structure of a red blood cell?12
12111601438Maple Syrup Urine DiseaseWhat disorder occurs when infants are unable to metabolize branched chain amino acids?13
12111620655Sickle cell anemiaWhat genetic mutation occurred in order to prevent malaria, but causes improper folding of RBC's?14
12111640071MethionineWhich amino acid contains a sulfur and is a precursor for a very import myelinating molecule?15
12111652511ProlineWhich amino acid disrupts a-helix and B-pleated sheet formations in secondary structure folding of proteins?16
12111676928PhenylalanineWhich amino acid is a precursor for tyrosine?17
12111683899Phenylketonuria (PKU)What disorder is a result of decreased metabolism for the amino acid phenylalanine?18
12111698380TryptophanWhich amino acid is a precursor for serotonin, melatonin, and niacin?19
12111705402TyrosineWhich amino acid is a precursor for thyroxine and is very important to the beginning pathways of cell signaling? I.e- RTK pathways20
12111725109Very low proteinWhat should someone with PKU ingest in their diet?21
12111731353Cystic FibrosisWhat is the most common genetic disorder?22
12111749106Serine and threonineWhich amino acids main function is to H bond to other molecules in protein regulation pathways?23
12111766687CysteineWhich amino acid contains a thiol (SH group) that acts as an antioxidant?24
12111780794GlutamineWhich amino acid is the main nitrogen carrier and is primarily synthesized in the brain?25
12111795037HistimineWhat molecule is important for its buffering capacity in hemoglobin?26
12111835933HydroxylysineWhich amino acid derivative is found in collagen?27
12111841904Isoelectric pointWhen are amino acids least soluble?28
12111852917pK1Which pK is a measure of the dissociation of the carboxylic acid group (C-terminal) on an AA?29
12111865757pK2Which pK is referring to the amine group of an AA?30
12111871070pKRWhich pK is referring to the dissociation of protons from the R group on an amino acid?31
12111886957ZwitterionWhat is the term that describes the net neutrality of an amino acid?32
12111903668Isoelectric point (pI)What is the point where an AA or protein is a zwitterion (neutral)?33
12111911098net positiveWhat is the charge when pH34
12111919626Net negativeWhat is the charge when pH>pI?35
12112091397Dehydration reactionsWhat type of reaction is involved in the synthesis of ALL macronutrients?36
12112119951GlutathioneWhat is the smallest peptide?37
12112124426pKRWhich pK group is the most important group for buffers?38
12112134821Conjugated proteinsWhat is a protein that has chemical constituents? i.e- glycoproteins and metalloproteins39
12112155246ConformationWhat is the spatial arrangement of atoms within a protein?40
12112159237Native conformationWhat is it called when a protein is in its most stable, functional conformation?41
12112198692HydrophobicWhat type of amino acids are buried in the middle of a structure, away from water?42
12112208272PrimaryWhat level of protein structure is just the order in which amino acids are aligned?43
12112222295SecondaryWhat level of structure contains a-helix, B-sheets, and B-turns?44
12112244829Beta turnsWhat reverses the direction of polypeptides from parallel to anti-parallel?45
12112280593QuaternaryWhat level of structure consists of two or more polypeptide strands that fold over and bond by non-covalent interactions? i.e- hemoglobin46
12112295575Primary and tertiaryWhich levels of structure use covalent (true) bonds?47
12112303110FourHow many different polypeptide strands make up hemoglobin?48
12112310608FibrousWhat type of protein contains a single secondary structure, and functions to provide support?49
12112319463GlobularWhat type of proteins have several secondary structures and make up enzymes?50
12112336039GlycineWhat AA does collagen have the most of?51
12112344264Triple helixWhat type of structure is collagen?52
12112348972ScurvyWhat disorder occurs from a lack of vitamin C?53
12112355337Vitamin CWhat is required for hydroxylation of proline and lysine in collagen synthesis?54
12112374068Posttranslational modificationWhat is the term that describes the addition of a functional group after the protein is synthesized?55
12112388002Proline hydroxylase and lysyl hydroxylaseWhat requires vitamin C to add a hydroxyl group to proline and lysine?56
12112420064Lysyl oxidaseWhat compound deaminates lysine and forms a reactive aldehyde?57
12112427164Copper (Cu)What is lysyl oxidase dependent upon?58
12112436447Matrix metalloproteins (MMP's)What degrades collagen?59
12112452166MotifWhat pattern of folding is not inherently stable?60
12112455830DomainWhat is the part of a polypeptide chain that is independently stable?61
12112501064Entropy (S)As a protein is folded what decreases?62
12112529158ChaperonesWhat are the molecules that assist in the folding of proteins?63
12112563003Degraded or accumulatedWhat happens to a protein if it misfolds?64
12112579913ProteostasisWhat process controls protein synthesis, folding, refolding, and degradation of proteins?65
12112647689Globular proteinsWhat type of proteins are easily denatured?66
12112657438intrinsically unstructured proteins (IUPs)What is a protein that has no specific structure on at least part of it?67
12112666903Signaling pathwaysWhat are IUP's important for?68
12112678124Metamorphic proteinsWhat are proteins that are able to form multiple structures that all have different functions?69
12112729253LigandWhat are molecules that are reversibly bound by a protein?70
12112740343Induced fitWhat is the structural adaptation of a protein in which a conformational change occurs for the the binding of a ligand?71
12112759677OneHow many oxygens can myoglobin carry?72
12112763504FourHow many oxygens can hemoglobin carry?73
12112771735OneIf a protein has one polypeptide strand (heme), how many oxygens can it carry?74
12112789336RelaxedIf a hemoglobin is acting as oxyhemoglobin and has a high affinity for binding oxygen, it is in which state?75
12112835450TenseIf a hemoglobin is acting as deoxyhemoglobin and has a low affinity for binding oxygen, it is in what state?76
12112849693Cooperative bindingWhat term describes the ability of oxygen to bind as more oxygen binds in a hemoglobin?77
12112864565High and easyWhat is the affinity for oxygen to bind to a hemoglobin if the hemoglobin already has three O2 bound? How difficult will it be for the last oxygen to bind?78
12112953203AllostericIf interactions of compounds affect the ability of heme groups to bind oxygen, it is said to be what?79
12112983534Deoxyhemoglobin (tense)A decrease in pH shifts the hemoglobin towards what state?80
12112988049Oxyhemoglobin (relaxed)An increase in pH shifts the hemoglobin towards what state?81
12113032371Low affinityIs affinity for oxygen high or low in peripheral tissues?82
12113050641Carbon monoxide (CO)What has a 250 times higher affinity to bind to iron in hemes than oxygen?83
12113073308Doesn't allow for release of O2 in tissuesWhat effect does CO have on the oxygen in hemoglobin?84
12113084056Hemolytic and obstructiveWhat are the types of jaundice?85
12113105859HemolyticWha type of jaundice has high levels of unconjugated bilirubin?86
12113115769ObstructiveWhat type of jaundice is able to excreted in the kidneys and has high levels of conjugated bilirubin?87
12113148859IgGWhat class of immunoglobulins is most common?88
12113152095IgAWhat class of immunoglobulins is found in secretions (tears, saliva, breastmilk)?89
12113157096IgEWhat immunoglobulin is the main antibody produced in response to food allergies?90
12113167194IgMWhat immunoglobulin is the first antibody produced during an immune response?91
12113697907Speed up reactionsWhat is the primary function of an enzyme?92
12113702873NoAre enzymes consumed in a reaction?93
12113706239CofactorWhat is the inorganic component of an enzyme?94
12113709064CoenzymeWhat is the organic component of an enzyme?95
12113723612VitaminsWhat are often used as coenzymes ?96
12113739639ApoenzymeWhat is the protein part of an enzyme?97
12113758803HoloenzymeWhat is the complete, active enzyme called? (The "whole" enzyme)98
12113773766ZymogenWhat is the inactive enzyme precursor called?99
12113782312End in "-ogen" or begin with "pro"How do you distinguish an inactive enzyme from an active one?100
12113800619OxidoreductaseWhat class of enzymes involves the addition or removal of H+? REQUIRES NAD+ or FAD101
12113816026TransferaseWhat class of enzymes involves the transfer of a functional group? Will often involve ATP, ending with a phosphate being bound to the product102
12113829485TwoHow many reactants and products will be involved in transferase?103
12113840816IsomeraseWhat class of enzymes rearrange functional groups on one molecule? Only involves one reactant and one product104
12113853237HydrolaseWhat class of enzymes causes hydrolysis to break bonds? Water is a reactant.105
12113859983LyaseWhat class of enzymes cleaves C-C, C-S, or C-N bonds ?106
12113868736LigaseWhat class of enzymes is the only class that involves the formation of bonds, and typically uses ATP, but results in a free phosphate group?107
12113988606Active siteWhat is the part of an enzyme that contains a binding site and a catalytic site?108
12114023448induced fitWhich active site model is the most common and allows for the enzyme to "mold" into a form where the substrate can bind?109
12114045305Binding energyWhat is the energy released through the formation of weak bonds in the active site?110
12114078828KMWhat is equal to one half of V Max?111
12156291279Vo is dependent on [S]What happens if [S]<112
12156302631Vo is dependent on both [E] and [S]What happens if [S]>Km?113
12156316490Vo is dependent on [E], enzyme is saturated with SWhat happens if [S]>>Km114
121563463401/VmaxWhat is the y-intercept of a line weaver burke plot?115
12156355463-1/KmWhat does the x-intercept of a Lineweaver-Burk plot represent?116
12156363077Km/VmaxWhat is the slope of a lineweaver burke plot?117
12156387957The number will be biggerWhat will happen if the line is closer to the origin of a lineweaver burke plot?118
12156404528[E]What does velocity of enzyme and substrate reactions depend on?119
12156415599Decrease enzyme activityWhat happens if there is a deficiency in vitamins or minerals?120
12156426734Increase in rateWhat happens to the enzyme if there is an increase in temperature?121
12156445214pH 1.5What is the optimum pH of pepsin?122
12156449814pH 6.2What is the optimum pH of sucrase?123
12156452882pH 6Wha tis the optimum pH of polyphenol oxidase?124
12156463340Denaturation of the enzymeWhat will extreme temperatures and pH do to the enzyme?125
12156475563Covalent bondsWhat type of bond is in irreversible inhibitor reactions?126
12156480612Noncovalent bondsWhat kind of bond is in reversible inhibitor reactions?127
12156494344Active siteWhere will a competitive inhibitor bind to?128
12156505301Increased Km and no change in VmaxWhat effect does a competitive inhibitor have on Km and Vmax?129
12156530563Only binds the complexWhat will an uncompetitive inhibitor bind to?130
12156541814Decreases Km and decreases VmaxWhat effect does the uncompetitive inhibitor have on the Km and Vmax?131
12156569456Active site or complexWhat will the noncompetitive inhibitor bind to?132
12156580157Decreases Vmax and doesn't change KmWhat is the effect of the noncompetitive inhibitor on Km and Vmax?133

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