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Material Type: Exam; Professor: Clark; Class: Biochem Phsl Microorgnsms; Subject: Microbiology; University: Southern Illinois University Carbondale; Term: Fall 2003;
Typology: Exams
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PART I: MULTIPLE CHOICE (80 points; two points per question) Circle the letter next to the single correct answer.
d) is made by E. coli to kill competing fungi which steal iron e) none of the above is true
c) The same transport protein moves sodium in one direction and another molecule in the opposite direction d) Sodium export is coupled to the excretion of a waste product e) Sodium is transported due to osmotic forces without the need for energy
PART II: ESSAY QUESTIONS (20 points per question) Choose any ONE question. Answer by notes and diagrams. Remember that one diagram is worth a thousand words. Use only one side of the paper provided.
PART I: MULTIPLE CHOICE (60 points) Circle the letter next to the single best answer. Two points per question.
a) the proton channel of the ATP synthase supplies protons to the basal body of the flagellum instead of using them to make ATP b) protons are bound by acceptor groups on a rotating ring of protein found at the base of the flagellum in the cytoplasmic membrane c) protons are bound by acceptor groups on a stationary protein ring at the base of the flagellum which is embedded in the cell wall d) sodium ions are used to operate the flagellum and later they are exchanged for protons by a separate transport protein e) protons move from the basal body down the inside of the flagellum and exit into the culture medium
c) formate dehydrogenase contains selenium as selenocysteine d) nitrate reductase contains selenium bound to molybdenum in its active site e) none of the above is true
SECTION I MULTIPLE CHOICE (150 points)
d) certain clay minerals e) magnesium or molybdenum ions
c) the B subunits make a channel through the membrane of eukaryotic cells that allows the A subunit to enter d) four B subunits are left outside and one enters bound to the A subunit by a disulfide bond e) none of the above is true