Download Exam 3 Unsolved Questions | Elements of Organic and Biochemistry | CHEM 1301 and more Exams Biochemistry in PDF only on Docsity! Chem 1301 - Elements of Chemistry I Instructor: Prof. John R. Sowa, Jr. Seton Hall University Exam III - 100 points Take home exam: Due by during Final Exam period, rm 62 Corrigan, 8:45 – 10:25 AM on Thursday, May 4th. Exam must be handed to Professor in person. 1)_________ 2)_________ 3)_________ 4)_________ 5)_________ TOTAL_________ Good Luck! 1. (14 points, 2 points each) Select the best answer for each following multiple choice question. a) Food preservation is often achieved by enzyme inhibition. Pickles that are stored in vinegar (dilute acetic acid) are preserved by what mechanism: a. increasing the temperature b. decreasing the temperature c. increasing the pH d. decreasing the pH b) Muscle contraction occurs by what mechanism: a. breaking the myosin-ATP complex b. making a myosin-actin complex c. breaking a myosin-actin complex d. both a and b c) What is the mode of bacterial action of penicillin? a. It inhibits the transpeptidase enzyme that makes bacterial cell walls rigid b. It kills all bacterial that do not need a cell wall c. It prevents folic acid synthesis by bacteria d. It inhibits protein synthesis by bacteria d) Muscle cramps are caused by the a. Accumulation of lactic acid b. Accumulation of pyruvic acid c. Speeding up the citric acid cycle d. Speeding up aerobic glycolysis e) In the glycogen storage disease called Cori's disease, the faulty enzyme is a. maltase b. phosphorylase c. debranching enzyme d. phosphotriose isomerase 3. (21 pts, 3 ea) Below is drawn a cross-section of the mitochondrion. a. What happens in the glycolysis process and where does this process occur? b. What happens in the oxidative phosphorylation cycle and where does this process occur. c. What is the most important molecule produced in the oxidative phosphorylation cycle? Where in the cycle is this molecule generated? d. What additional molecule must be supplied (or breathed in) to complete the cycle? 4) (24 pts, 3 ea) The diagram below is the catabolic pathway for carbohydrates. Important compounds involved in this pathway are indicated by lines. Important multistep pathways are indicated by boxes or circles. Match the important compounds with the compounds on the next page. Fill in the important step pathways from information you learned in class.
