Study exam 3
Study exam 3 BIOL 2460-001
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This 5 page Study Guide was uploaded by Mercy on Sunday November 15, 2015. The Study Guide belongs to BIOL 2460-001 at University of Texas at Arlington taught by Dr. Michelle Badon in Summer 2015. Since its upload, it has received 183 views. For similar materials see Nursing Microbiology in Biology at University of Texas at Arlington.
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Date Created: 11/15/15
Study guide for exam 3 Monday November 9 2015 2314 Chapter 8 1What are the 2 most common type of biofuels Ethanol and biodiesel 2What is the problem with using solid biomass The cellulose in it is not easily broken down into its component sugar for fermentation 3What is metabolism It is a Greek word for change Change all chemicals and physical working of the cell It is the sum total of chemical reactions used for biosynthetic and energy harvesting process 4 encompasses all of the cells chemical reactions and energy transactions Metabolism 5What are the functions of metabolism Catabolism Release and conserve energy in the form of ATP or heat Anabolism 6Define the 2 major components of metabolism Catabolism is the breakdown of compounds or bonds of larger molecules into smaller molecules and energy ATP is often release Anabolism Is the building up subunits of macromolecules into larger molecules It usually requires energy input 7What is an enzyme An enzymes is a protein catalysts that have great specificity for the reaction catalyzed and the molecules acted on 8Do microorganism require enzymes for reaction TRUE OR FALSE True 9What is a Catalyst a substance that speeds up the rate of chemical reaction without being permanently altered itself or becoming consumed in the reaction 10Define Energy of activation is the amount of energy which must be overcome for a reaction to proceed 11Which of the following is true a Most catalyzed metabolic reactions do not occur fast enough to sustain life cell processes b Most uncatalyzed metabolic reactions occur fast enough to sustain cell processes therefore they do not require enzymes c Enzymes do not speed up the rate of reaction and are dispensable to life d Most uncatalyzed metabolic reactions do not occur fast enough to sustain cell processes therefore enzymes speed up the rate of the reaction and are indispensable to life 12Enzymes accelerate reactions by lowering the activation energy TRUE OR FALSE True 13What is activation energy is the energy required to bring the reacting molecules together in the correct way to reach transition state 14Which is the correct equation connecting substrate product and enzyme a Substrate Product enzyme b Productenzyme substrate c Substrateenzyme Products d None of the above e All of the above 15 are reacting molecules while are substances formed a substrate products 16Enzymes bring substrates together on a special place in their surface called the to form an enzyme substrate complex a active site b substrate site c Catalytic site d Both A and C e All of the above 17What is an active site a is a threedimensional shape which creates a site for binding the substrates 18Active site of consists of a that are involved in making contact with the substrates group of amino acids 19t has been estimated that the bacterial cell contains different enzymes a exactly 200 b 20 c 2000 d All of the above e None of the above It contains more than 200 20What are the ways enzyme interact with the substrate Lock and Key model Induced fit model 21The primary structure of an enzyme is Protein 22What are conjugated enzymes is an enzyme with a protein and non protein molecules 23What is a holoenzyme enzyme a is when an enzyme is completed with its cofactor 24Which is the correct equation a cofactor holoenzyme apoenzyme b apoenzyme holoenzyme cofactor c apoenzyme cofactor holoenzyme d None of the above 25They support the work of the enzymes and are either organic molecules or inorganic elements This refers to which of the following apoenzyme metal ion cofactors coenzymes all of the above hich is correct metals activate enzymes and help bring the active site and substrate close together metals participate directly in chemical reactions with the enzyme substrate complex the simplest cofactors are metal ions All of the above None of the above 27 is a type of cofactor coenzymes 28which is an example of coenzyme that carries electrons within the cell a NADPH b ADP c NAD d none of the above 28Covently attached cofactors are called Prosthetic groups 29Which is the most important component of coenzymes a Metal Ions b Vitamins c NAD d Organic compounds e Inorganic compounds 30What are the 6 classes of enzymes oxidoreductase Transferase Lyase lsomerase Ligase Hydrolase 31When enzymes are subjected to change in normal conditions they become chemically unstable This is known as Labile 32At substrate concentration an enzyme performs slowly while at substrate concentration they performance increases 26 anUmEanUm High Low Medium Maximum Optimum maximum Low High e None of the above 33Enzymes that function outside of the cell are called while those that function inside are called a endoenzymes exoenzymes b exoenzymes endoenzymes 34Enzymes contribute to microbial pathogenicity a True b False Use the following information to answer 35 38 Match the following enzymes to their correct bacterium 35Elastase 36 Collagenase 37 streptolysin 38 lecithinase C a Streptococcus pyogenes b Pseudomonas aeruginosa c Clostridium perfringens d None of the above 35B 36 B 37 A 38 C 39Which enzyme inactivates and not digest tissues a Lecithinase C b Penicillinase c Streptokinase d Elastase e None of the above 40What are enzyme inhibitors they are poison to microorganisms by serving as an inhibitor of the catalytic activity of an enzyme 41Which is true of competitive inhibitors a They are compounds that have a similar structure mimic to the normal substrate b These compounds are able to bind to the active site but will not react c they mimic normal substrate and supply molecules that resembles the enzyme39s normal substrate d it is reversible and the enzyme is not altered e All of the above 42What are non competitive inhibitors a they are irreversible and combines with the enzyme at a place other than the active site b they directly compete with substrate at an enzyme39s catalytic site c they do not directly compete with the substrate d both A and C e None of the above 43 enzymes are those which contain both regulatory and active sites Allosteric 44 binds to the regulatory site of an allosteric enzyme and alters the enzymatic activity Modulator Activators Effector Inhibitors both A and C 45 turns on activity therefore increasing enzymatic activity while turns off activity or decrease activity a Inhibitors activators b Activators inhibitors c None of the above 46Which is true of feedback inhibition a it occurs when the end product of the enzyme pathway quotfeedbackquot into the pathway as an inhibitor of the first enzyme in the pathway b It is also known as end product inhibition c None of the above d All of the above 47 catalyzes the slowest or rate limiting reaction in the pathway Pacemaker enzyme 48What is the equation for the hydrolysis of ATP 9 05 DQnCTQJ ATP H20 ADP p1 49When ATP is formed by the transfer of a phosphate group from a substrate directly to an ADP to yield ATP is called and when ATP is formed when the energy from the electron transport is used to make ATP is called Substrate level phosphorylation oxidative phosphorylation 50What is bioenergetics it is the study of the production and use of energy by cells 51Amphibolic pathway a functions both catabolically and anabolically b include glycolytic and tricarboxylic acid cycle c reactions are freely reversible and can be used to synthesize and degrade molecules d None of the above e All of the above 52 is defined as metabolism or degradation when the final electron acceptor molecules are oxygen or inorganic molecules Respiration 53How many level of regulation of enzymes do we have 0 2 54What is the major enzyme pathway in which organic molecules serves as both electron donors and acceptors a glycolysis b Glycolytic pathway c Embden Meyerhof Parnas d both A amp B e all of the above 55Glycolysis functions the presence of oxygen and without oxygen a True b False 56Glycolysis breaks down glucose into Pyruvate 1 glucose is broken down into 2 pyruvate 57How many steps is glycolysis subdivided into 3 steps 58What are isomers they are substances that are composed of the same elements in the same proportions but differ in properties because of differences in the arrangement of atoms 59What is the cycle in which energy is released from the breakdown of glucose to pyruvate and takes place in the cytoplasm of bacteria and in the mitochondrial matrix in eukaryotes a Krebs Cycle b Glycolysis c Citric Acid cycle d the Tricarboxylic Acid cycle TCA e A C amp D 60An enzyme reaction which links glycolysis and the Krebs cycle is called Pyruvate Dehydrogenase 61What is the final quotprocessing millquot for electrons and hydrogen ions a Electron Transport b Oxidative Phosphorylation c Glycolysis d Citric Acid cycle e None of the above 62Which is true of Electron Transport Chain a is a group of membrane embedded electron carriers that pass electron sequentially from one to another b the reduction of oxygen occurs in the cell membrane and is mediated by a series of proteins c the release of energy is captured and used by the ATP synthase complex d None of the above e All of the above 63What is ATP synthase 0 it is an enzyme that uses energy to synthesize ATP 64The gross ATP production in glycolysis Krebs cycle and ETC is a 38 ATPs b 18 ATPs c 32 ATPs d 34 ATPs e None of the above 65What is the net ATP production in glycolysis Krebs cycle and ETC a 18 ATPs b 40 ATPs c 34 ATPs d 38 ATPs e None of the above 66When does fermentation metabolism occur it occurs when the final electron acceptor molecules are organic molecules NOTE Read more on fermentation Aerobic respiration Anaerobic respiration summary of Aerobic respiration Process of ETC Glycolysis and Kreb Cycle The metabolic role of ATP Characteristics of enzymes
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