Exam 2 Qwizdom - Mutations in one of the junctional...

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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 Correct answer: Gap junctions, which facilitate a coordinated spread of Ca++ through the heart during contraction
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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. Correct answer: C
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+ 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.
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This note was uploaded on 12/06/2009 for the course BIO 172 taught by Professor Clark during the Winter '08 term at University of Michigan.

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Exam 2 Qwizdom - Mutations in one of the junctional...

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