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Reading Quiz 4 Ch 4 (Enzymes).docx

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Department
Biology
Course
BIOL 1000
Professor
All Professors
Semester
Summer

Description
READING QUIZ 4: CH 4 (ENZYMES) Reading Quiz 4: Ch 4 (Enzymes) This quiz is on the material in Chapter 4 (Enzymes). You will only be allowed to attempt the quiz once, but you have 1 hour (60 minutes) to complete the 10 questions. Please note: you will only receive your score once the quiz is closed to everyone (it closes Sunday night at midnight, so Monday you should be able to see how you did). Instructions o Click Save without submitting after answering each question; o Click Submit all and finish when finished with the quiz; o The timer runs overtop of the questions, so open a big enough window in order to clearly view the questions. o Leaving the quiz does not stop the timer! o Make sure that your browser is set to the recommended browser settings. For more information on browser settings, see: http://moodle.yorku.ca/students/ o If possible, use a cable connection, rather than wireless to reduce the likelihood of interruption while answering a question. Started on Saturday, 13 October 2012, 08:43 PM Completed on Saturday, 13 October 2012, 08:53 PM Time taken 10 mins 34 secs Marks 5.00/6.00 Grade 83.33 out of a maximum of 100.00 Question 1 Correct Mark 1.00 out of 1.00 0 qaid=664811&qub 0 Flag question Question text 3 Which of the following best describes the process of non-competitive feedback inhibition? Select one: a. The substrate and cofactors compete for the active site. b. The products of the reaction directly block the active site of the enzyme. c. The products of the reaction at the end of the pathway bind to a site other than the active site of an enzyme at or near the beginning of the pathway and block enzyme activity indirectly. d. The inhibitor binds to and directly blocks the active site of the enzyme. Feedback The correct answer is: The products of the reaction at the end of the pathway bind to a site other than the active site of an enzyme at or near the beginning of the pathway and block enzyme activity indirectly. Question 2 Correct Mark 1.00 out of 1.00 0 qaid=664814&qub 0 Flag question Question text 3 The difference between cofactors and coenzymes is that Select one: a. cofactors are always vitamins; coenzymes are always ions. b. cofactors are not necessary; coenzymes are neces
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