H2O2 + catalase = 2 H2O2 + O2, is an example of what enzyme specificity? * A. Stereochemical B. Group C. Absolute D. Linkage E. Optica F. Co-Factor
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- PREDICT In the following reaction series, which enzyme(s) is/are most likely to have an allosteric site to which the end product E binds? (a) enzyme 1 (b) enzyme 2 (c) enzyme 3 (d) enzyme 4 (e) enzymes 3 and 4the type of enzyme inhibition in which covalent bulky adduct prevents catalysis is ? a) uncompetitive b) reversible c) noncompetitive d) competitive e) IrreversibleWhat is the CORRECT sequence of events to activate an enzyme? Group of answer choices a. enzyme/product complex-enzyme/substrate complex-products leaving active site-substrate entering active site b. enzyme/product complex-products leaving active site-enzyme/substrate complex-substrate entering active site c. substrate entering active site- enzyme/product complex-enzyme/substrate complex-products leaving active site d. substrate entering active site-enzyme/substrate complex-enzyme/product complex-products leaving active site
- Choose the best answer The active site of an enzyme is the place where the following happens: a)The enzyme-substrate complex forms and the reaction occurs at the active site. b)The enzyme substrate complex forms here. c)The catalytic reaction happens here. d)Allosteric regulation of enzyme rate occurs here. e)All of these are correct.a) How do enzymes catalyze (increase the rate of) reactions? b) What does it mean that enzymes are “substrate specific”? c) How are they usually nameDoes the enzyme described in each of the following statementsrequire a cofactor to be active?(a) Ni2+ is present in the active site.(b) Addition of FAD allows the reaction to occur.(c) The presence of K+ does not affect the reaction.
- Determine the class of enzyme that is most likely to catalyze each of the following reactions, see bottom Figure 6D:Enzymes work by at least three mechanisms. Which of the following is NOT a mechanism by which enzymes function? A. by putting reactants in close proximity to each other. B. by altering the free energy ( ΔG) of the reaction. C. by orienting the reactants so they are positioned to favour the transition state. D. by altering the immediate environment of the reactants to promote reactant interactions.Match with the given reactionA. The reaction that is slowest in reacting with the enzymeB. The reaction that is fastest in reacting with the glucose oxidaseC. The reaction that is most fitted in the active site of the enzyme
- . Based on what you know about enzyme inhibition, classify the following examples as irreversible, competitive, or noncompetitive enzyme inhibition. A) competitive B) noncompetitive C) irreversible 1) Diisopropyl fluorophosphate binds to acetylcholinesterase and permanently inactivates the enzyme. Paralysis results. 2) A drug binds to the active site of an enzyme but disassociates and leaves the enzyme active. 3) A toxin binds to the surface of an enzyme. The enzyme then binds the substrate, but no product is produced. The toxin may disassociate and the enzyme will become active again. 4) Vitamin K is a coenzyme involved in blood clotting. An anticoagulant drug binds at the site of vitamin K bonding, blocking vitamin K binding and preventing clotting. Clotting resumes after the patient stops taking the drug. 5) Aspirin binds to prostaglandin synthetase and permanently stops its ability to produce prostaglandin.How does an enzyme affect a chemical reaction? Select all that apply. A. Lowers the activation energy B. Decreases the rate of the reaction C. Increases the activation energy D. Increases the rate of the reactionAs a researcher you wish to know how well your newly discovered enzyme works compared to other known enzymes. which catalytic parameters will determine and why?