Jefferson MICRO 227 – Enzymes are important to metabolic

Jefferson MICRO 227 – Enzymes are important to metabolic

QUESTION 1Enzymes are important to metabolic reactions of the cell in which of the following ways?Enymes allow reactions that could not normally occur.Enzymes lower the activation energy needed for the reaction.Enzymes increase the rate (speed) of reaction so that the reaction occurs more quickly.Both A and B are correctBoth B and C are correct.1 points QUESTION 2What is the correct term for the area on the enzyme which binds to and interacts with the substrate?Substrate binding siteActive siteAllosteric siteCofactorAmino acid bridge1 points QUESTION 3What is the expected result of the substrate binding to the enzyme?Metabolic pathway proceedsMetabolic pathway stops and can not restartMetabolic pathway stops but can resume when inhibition is removedSubstrate binding to the enzyme has no effect on cell function.1 points QUESTION 4Where, on the enzyme, will a competitive inhibitor bind?Active siteAllosteric siteBoth of these simultaneouslyBoth of these at different timesNeither A nor B1 points QUESTION 5What is the expected result when a competitive inhibitor binds to the enzyme?Metabolic pathway proceedsMetabolic pathway stops and can not restartMetabolic pathway stops but can resume when the inhibition is removed.The competitive inhibitor binding to the enzyme has no effect on cell function.1 points QUESTION 6In microbial cells, the endproduct of a metabolic pathway may bind to one of the first couple of enzymes in the pathway. What is the correct name of this process?Noncompetitve inhibitionCompetitive InhibitionFeedback inhibitionAnswers 1 and 3 are correct.Answers 1 and 2 are correct.All answers are correct.1 points QUESTION 7In microbial cells, the endproduct of a metabolic pathway may bind to one of the first couple of enzymes in the pathway. What is the correct term for the area on the enzyme where this binding occurs?Active siteAllosteric siteSubstrate binding siteAmino acid bridgeNone of these1 points QUESTION 8What is the expected result when the endproduct of a metabolic pathway binds to an enzyme in that pathway?Metabolic pathway proceedsMetabolic pathway stops and cannot restartMetabolic pathway stops but can resume when the inhibition is removed.The binding of the endproduct to the enzyme has no effect on cell function.1 points QUESTION 9Most enzymes are active at one particular temp. What result on enzyme function would you expect if a bacteria culture was placed at a temperature BELOW its “best” temperature?No effect on enzyme activityEnzyme activity would slow but continueEnzyme activity would quickly stopEnzyme activity would increase1 points QUESTION 10Most enzymes are active at one particular temp. What result on enzyme function would you expect if a bacteria culture was placed at a temperature ABOVE its “best” temperature?No effect on eznyme activityEnzyme activity would slow but continueEnzyme activity would quickly stopEnzyme activity would gradually slow over a 2-3 day period


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