Biology172-E2 W08 practice

Biology172-E2 W08 practice - Exam 2 Practice Questions...

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Exam 2 Practice Questions Winter 2008 1. Mutations in one of the junctional complexes below causes an irregular heartbeat. Which one do you think it is. A)Tight junctions B)Desmosomes C)Cadherins D)Plasmodesmata E)Gap junctions 2. Which statement about phosphofructokinase regulation by ATP is not true. A)ATP is an allosteric regulator of the enzyme. B)ATP is a non-competitive inhibitor of the enzyme. C)ATP is a competitive inhibitor of the enzyme. D)High levels of ATP lowers the affinity of fructose 6-phosphate for the enzyme. E)High levels of ATP lowers the Vmax of the enzyme. 3. If a H + ionophore was added to mitochrondria, which of the following would occur? A)ATP synthesis by oxidative phosphorylation would be inhibited. B)ATP synthesis by oxidative phosphorylation would be increased. C)Electron transport through the ETC would be shut down. D)ATP synthase would hydrolyze ATP to ADP + Pi. 4. When marathon runners “hit the wall” after about 20 miles of
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Biology172-E2 W08 practice - Exam 2 Practice Questions...

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