Test1%20Sp07 pcb - PCB3134 - Test 1 Spring, 2007 YOU WILL...

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PCB3134 - Test 1 Spring, 2007 YOU WILL BE AWARDED 2 BONUS POINTS ON THE EXAM IF YOU FOLLOW THESE DIRECTIONS DIRECTIONS 1. Enter your name and UFID number on your answer sheet, BOTH PRINTED & FILL IN THE BUBBLES. 2. Enter the five-digit test code number in slots 76-80 of your answer sheet. The test code can be found at the bottom of each page on your test. IT IS IMPORTANT THAT THIS IS DONE CORRECTLY OR YOUR TEST CANNOT BE GRADED !!! 3. Answer each question with the ONE BEST answer. 4. Turn in your answer sheet when you have finished. 5. KEEP YOUR TEST SO THAT YOU WILL HAVE THE TEST CODE NUMBER. Grades will be posted by test code numbers. --------------------------------------------------------------------------------------------------------------------------------- READ EACH QUESTION CAREFULLY . Select the BEST ANSWER. If you do not understand the question, you may ask the instructor for clarification. --------------------------------------------------------------------------------------------------------------------------------- 1. Which of the following weak bonds may function in the formation of complexes between macromolecules in cells? a. ionic bonds b. hydrogen bonds c. van der Waal bonds (1) a (2) a, b (3) a, b, c (4) a, c (5) b, c 2. Which of the following are polymers of similar subunits? a. complex lipids b. ribonucleic acids c. polysaccharides d. proteins (1) b, d (2) b, c, d (3) a, b, c, d (4) b, c (5) a, c, d 3. A reaction in a cell (that based on the concentration of reactants and products) has a change in free energy ( Δ G') that is a positive value. For this reaction to occur (1) it must be catalyzed by an enzyme with a high turnover number (Kcat). (2) it must be coupled to a reaction or reactions that occur with a negative change in free energy ( Δ G'). (3) it must be catalyzed by an enzyme with a low energy of activation. (4) it only requires that an enzyme be present to catalyze the reaction and none of the conditions in the choices above must apply. 4. Which of the following characteristics of cells is not shared by any virus? (1) DNA is the genetic information (2) motility (3) genome is present in a nucleus (4) surrounded by a phospholipid membrane (5) contain enzymes
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5. Which of the following is know for their work in development of optical lenses that greatly improved the useful magnification of light microscopes compared to the microscopes that were available at the time. (1) Fredrich Wohler (2) Robert Hooke (3) Robert Brown (4) Anton van Leeuwenhoek (5) Johann Fredrich Miescher 6. Which of the following statements about enzymes is NOT true? (1) Only some enzyme's activity can be regulated by the presence of activators or inhibitors. (2) Enzymes may be covalently modified during the catalysis of a biochemical reaction, but return to their
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Test1%20Sp07 pcb - PCB3134 - Test 1 Spring, 2007 YOU WILL...

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