Enzymes
In the enzyme-catalyzed reaction shown below, what will be the effect on substances A, B, C, and D of inactivating the enzyme labeled E2? A ---(E1)---> B ---(E2)---> C ---(E3)--->

A, B, and C will still be produced, but not D
A and B will still be produced, but not C or D
A will still be produced, but not B, C, or D
A, B, C, and D will all still be produced

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Enzymes
How is the enzyme COX-1 important in human health?

It is a chemical derivative of aspirin
It is critical for the biosynthesis of DNA
It catalyzes the production of hormones that maintain the stomach lining
It helps to transport carbon dioxide in the blood

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Enzymes
The E.coli pyruvic acid dehydrogenase complex is reported to

decatalyze the oxidation of pyruvic acid to acetyl Co A and CO2
retard the reduction of pyruvic acid to acetyl Co A and CO2
Catalyze the reduction of pyruvic acid to acetyl Co A and CO2
Catalyze the oxidation of pyruvic acid to acetyl Co A and CO2

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