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Unformatted text preview: BILD2 / Spring 2006 / MIDTERM 2 NAME: ____________________________ Traver / Kiger BILD 1 MIDTERM EXAM #2 PRINT YOUR NAME LEGIBLY ON EVERY PAGE!! ALL STUDENTS READ THE FOLLOWING WAIVER: By signing this waiver, I give permission for this exam to be returned to me in class. This may expose my score to other students. If I do not sign this waiver, I acknowledge that this exam will not be returned in class but rather must be picked up in the office of Ria del Rosario in Room 4119 of the Natural Sciences Building on or after 5/16. Exams not picked up by the end of Spring quarter will be discarded. ___________________________________________ _________________________ (Student Signature) (Date) QUESTION: POINTS: 1. ________ (14 total) 2. ________ (18 total) 3. ________ (23 total) 4. ________ (9 total) Extra Credit. ________ (6 possible) 5. ________ (20 total) 6. ________ (16 total) 7. ________ (16 total) 8. ________ (18 total) 9. ________ (16 total) Extra Credit. ________ (6 possible ) TOTAL ________ (150 points total) BILD2 / Spring 2006 / MIDTERM 2 NAME: ____________________________ Traver / Kiger PROBLEM 1. Metabolism Circle the best answer for parts A ! E. A. If an enzyme has been inhibited competitively, (2 POINTS) (a) the ! G for the reaction it catalyzes is negative. (b) the active site will be occupied by the inhibitor molecule. (c) raising substrate concentration will increase inhibition. (d) raising substrate concentration will not affect inhibition. B. Allosteric inhibition, (2 POINTS) (a) is a type of noncompetitive inhibition. (b) is a type of competitive inhibition. (c) can be overcome by raising substrate concentration. (d) can only occur in multisubunit protein complexes. C. In this branched metabolic pathway, a red arrow with a minus sign symbolizes inhibition of an enzyme by an end product: Which reaction would prevail if R was present in the cell in high concentrations? (2 POINTS) Use the following figure to answer parts D through G, below: F. What does c represent? (2 POINTS) _____________________________________ G. How would the ! G of the reaction change with the addition of an enzyme? (2 POINTS) _______________________________________________________________________ (a) L ! M (b) M ! O (c) L ! Q (d) O ! S (e) L ! S D. Which of the following terms best describes this reaction? (2 POINTS) (a) Spontaneous (b) Endergonic (c) Allosteric (d) Anabolic E. Which letter on the graph represents the ! G for the reaction? (2 POINTS) (a) (b) (c) (d) (e) BILD2 / Spring 2006 / MIDTERM 2 NAME: ____________________________ Traver / Kiger PROBLEM 1. Metabolism Circle the best answer for parts A ! E. A. If an enzyme has been inhibited competitively, (2 POINTS) (a) the ! G for the reaction it catalyzes is negative....
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- Spring '08