Current Location 1.Principles of Biology (BIO102.SP13.ZB)2.Assignments3....4.Module 3 Quizzes, Exam, and Study Materials5.Review Test Submission: Ch 5 Quiz: The Dynamic Cell Skip to Course ContentSkip to Top Frame TabsMenu Management OptionsPrinciples of Biology (BIO102.SP13.ZB)Home PageAnnouncementsStaff InfoSyllabus & ResourcesAssignmentsDiscussion Board
My GradesSend EmailAppsReview Test Submission: Ch 5 Quiz: The Dynamic Cell Skip to Course Menu Skip to Top Frame Tabs ContentUserRebekah Breitkreutz CoursePrinciples of Biology (BIO102.SP13.ZB)TestCh 5 Quiz: The Dynamic Cell Started2/17/13 8:54 PM Submitted2/17/13 9:15 PM StatusCompleted Attempt Score3.5 out of 5 points Time Elapsed20 minutes. InstructionsQuestion 1 0.5 out of 0.5 pointsEnzymes are able to speed up the rate of a reaction byAnswer Selected Answer:lowering the energy needed for the reaction to proceed.Response Feedback: Enzymes are able to overcome the energy needed to start a reaction, called the energy of activation. By doing this they make reactions happen more readily.Question 2
0.5 out of 0.5 pointsThe changing of an enzyme’s shape as the substrate binds to the active site is called theAnswer Selected Answer:induced fit model.Response Feedback: According to the induced fit model the binding of the substrate to the active site results in a change in the shape of the enzyme so that they fit together more exactly.Question 3 0.5 out of 0.5 pointsWhich of the following is not a mechanism used to move materials in and out of the cell?Answer Selected Answer:feedback inhibitionResponse Feedback: The plasma membrane regulates the passage of molecules into and out of thecell. Some of the key mechanisms include facilitated diffusion, osmosis, phagocytosis, pinocytosis, and active transport.Question 4 0 out of 0.5 pointsEnzymes are named based on the substrate that they bind; this is possible becauseAnswer Selected Answer:enzymes speed up the rate of a reaction.Response Feedback:An enzyme is able to catalyze one substrate and produce one product.Question 5 0.5 out of 0.5 pointsWhen a cell is in a solution where the concentration of solute is the same in the cell as in the solution, the solution is called ________.Answer Selected Answer:
isotonicResponse Feedback: In isotonic solutions cells neither gain nor lose net water since the concentration of solutes (and therefore water) is the same in the cell as is in the solution.Question 6 0 out of 0.5 pointsWhen neurons release their neurotransmitters, they release them by secretory vesicles fusing with the plasma membrane thereby emptying their contents into an area that can stimulate some response. What type of cellular transport is occurring as the vesicle forms and then surfaces on the cell's plasma membrane?
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