midterm2 - BIS103 Fall 2010 Midterm #2 Instructor: Oliver...

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BIS103 Fall 2010 Midterm #2 Student Name _____________________________ Instructor: Oliver Fiehn Student ID #_______________________________ A-Group Pencil in your student ID into your blue scantron now. Have your student ID ready for inspection when you hand in your exam. Please, check appropriate box below. Undergraduate student Open enrollment Completing incomplete Graduate student This exam consists of 45 questions. Questions will be calculated as 100 percent maximum to be earned. There are a total of 12 pages, including the cover page. If you need more space, use the back of pages. The scantron machine does not allow for partial credit. Exams can be picked up from Dr. Fiehn’s office, if needed, but will not be returned in class. Petitions for regrading will be considered only if you can prove that a question had more than one correct answer. I am aware that violations of the Academic Code of Conduct 1 will be reported to UC Davis Student Judicial Affairs. 1 Examples of academic misconduct include: receiving or providing unauthorized assistance on examinations, using unauthorized materials during an examination, altering an exam and submitting it for re-grading, or using false excuses to obtain extensions of time (http://sja.ucdavis.edu/cac.htm). Signature________________________________________ Date________________________
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2 points Glycogen storage diseases are inherited disorders of glycogen metabolism. For example, von Gierke's Disease is caused by a deficiency of liver glucose-6- phosphatase and results in an enlarged liver and low blood sugar. Mark the correct biochemical explanation for this disease. a. Glucose-6-phosphatase is an important step in UTP-glucose formation. Without that activation of glucose, glycogen balancing is disturbed and the liver increases. b. Glucose-6-phosphatase works in liver mitochondria. Without that enzyme, glucose cannot be transported across the mitochondrial membrane and therefore, glycogen metabolism gets disrupted and the liver increases by too much glucose in the liver. c. Glucose-6-phosphatase releases inorganic pyrophosphate which then is exported into the bloodstream. If that enzyme does not work properly, glycogen biosynthesis is activated and the liver increases due to too much glycogen. d. Glucose-6-phosphatase isomerizes Glucose-6-phosphate and Glucose-1- phosphate. This is the key enzyme linking glycolysis and glycogen metabolism. If the enzyme is dysfunctional, too much glucose-6- phosphate is present which activates glycogen biosynthesis, causing an enlarged liver. e. All of the above is incorrect Q02 2 points Which mechanism does not refer to dissipation of energy after photons are absorbed in the antennae and light harvesting complexes of photosynthetic organisms? a.
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midterm2 - BIS103 Fall 2010 Midterm #2 Instructor: Oliver...

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