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- Which of the following is correct regarding enzymes? Enzymes can speed up the rate of reaction by shifting the equilibrium of the reaction forward. Enzymes can make a nonspontaneous reaction spontaneous. Most enzymes are made up of DNA and RNA and are named based on the reaction that they catalyze. Enzymes can increase the rate of a reaction, but do not shift the equilibrium of a reaction.Which of the following statements is false regarding an enzyme's ability to catalyse a reaction? an enzyme provides a reaction surface and a hydrophilic environment for the reaction to take place an enzyme binds reactants such that they are positioned correctly and can attain their transition-state configurations an enzyme allows the reaction to go through a more stable transition state than would normally be the case an enzyme can weaken bonds in reactants through the binding processCoenzymes function to: change the shape of enzymes, allowing different additional substrates to bind. denature the enzyme, stopping the chemical reaction from occurring. interact directly with enzymes, either enabling the reaction to occur or making the substrate-enzyme interaction more efficient. dilate blood vessels, allowing more blood to flow, allowing more substrate to reach enzymes. absorb excess hydrogen and hydroxide ions, keeping the pH relatively stable, so that reactions can occur most efficiently.
- Which of the following describe(s) an exergonic reaction? energy is released non-spontaneous energy is absorbed spontaneousWhich of the following is/are TRUE of an enzyme? Enzymes lower the release of free energy Enzymes are not consumed in a reaction Not all enzymes are proteins Enzymes only affect endergonic reactions Enzymes only affect exergonic reactionsHere is a chemical reaction: H₂O2 -> O2 + H₂O What is/are the reactants? What is/are the products? H₂O2 is the product while O₂ and H₂O are reactants. There are no products or reactants as an enzyme is needed for the reaction to occur. There are no products or reactants as O2 and H₂O occur in the environment. O H₂O2 is the reactant while O₂ and H₂O are products
- In the following reaction, which is/are substrate(s), enzyme, products, allosteric inhibitor(s), negative regulator(s), and reactant(s)? Z A + B → C +DAmylase is an enzyme found in saliva that breaks down starch. The enzyme is currently functioning at its optimal pH of 7 and optimal temperature of 32oC. Which of the following could result in an increase in the reaction rate? Providing an environment with a pH of 9. Decreasing enzyme concentration. Placing the reactants in an environment at 10oC. Increasing substrate concentration.Question 4 The main function of catalase is to break bonds between amino acids in proteins and aid in digestion break bonds between monosaccharides in starch and aid in digestion break down hydrogen peroxide into oxygen and water cause browning of fruits and vegetables when they are cut or damaged Question 5 What happens to an enzyme when it is denatured? Its 3D shape changes and it can no longer catalyze the reaction. It modifies the shape of the active site and increases the rate of reaction under optimal conditions. Its 3D shape and all levels of its structure are disrupted, so it can no longer catalyze the reaction. O Its primary structure is disrupted and the enzyme breaks down, making it unable to catalyze the reaction. 1 pts 0.75 pts
- Two substrates (A and B) are used to produce a certain biological product in an enzyme- catalyzed reaction. It is found that both substrates must bind to the enzyme, first Substrate A, then Substrate B before the product is produced. What kind of kinetic mechanism is described? Linear Reaction Ordered Sequential Reaction Random Sequential Reaction Ping Pong ReactionDrag and drop the statements to the correct box: Enzymes DO: Decrease required activation energy Enzymes DON'T: Remain unchanged during the reaction Increase the reaction rate Energy Change the products made Activation energy (X+Y) reactants Change the reactants used Activation Energy A Activation energy (Y→X) products ΔΗ Reaction path Reaction without catalyst Reaction with catalyst Name two things we learned that can denature an enzyme:Which of the following statements is NOT true? Enzymes increase the probability that a chemical reaction will take place by lowering the activation energy The energy required to cause a chemical reaction to occur is called the activation energy Chemical reactions in living cells are catalyzed by enzymes None of the other four answers (all are true) Decomposition (degradation, catabolic) reactions are usually endergonic
